20157984

素因数分解:

$2^5\times 3^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1$

素因数の和:141

約数の個数: 240

約数和(自身を含む): 74644416

約数和(自身を除く): 54486432

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 14, 16, 18, 21, 22, 24, 27, 28, 32, 33, 36, 42, 44, 48, 54, 56, 63, 66, 72, 77, 81, 84, 88, 96, 99, 101, 108, 112, 126, 132, 144, 154, 162, 168, 176, 189, 198, 202, 216, 224, 231, 252, 264, 288, 297, 303, 308, 324, 336, 352, 378, 396, 404, 432, 462, 504, 528, 567, 594, 606, 616, 648, 672, 693, 707, 756, 792, 808, 864, 891, 909, 924, 1008, 1056, 1111, 1134, 1188, 1212, 1232, 1296, 1386, 1414, 1512, 1584, 1616, 1782, 1818, 1848, 2016, 2079, 2121, 2222, 2268, 2376, 2424, 2464, 2592, 2727, 2772, 2828, 3024, 3168, 3232, 3333, 3564, 3636, 3696, 4158, 4242, 4444, 4536, 4752, 4848, 5454, 5544, 5656, 6048, 6237, 6363, 6666, 7128, 7272, 7392, 7777, 8181, 8316, 8484, 8888, 9072, 9504, 9696, 9999, 10908, 11088, 11312, 12474, 12726, 13332, 14256, 14544, 15554, 16362, 16632, 16968, 17776, 18144, 19089, 19998, 21816, 22176, 22624, 23331, 24948, 25452, 26664, 28512, 29088, 29997, 31108, 32724, 33264, 33936, 35552, 38178, 39996, 43632, 46662, 49896, 50904, 53328, 57267, 59994, 62216, 65448, 66528, 67872, 69993, 76356, 79992, 87264, 89991, 93324, 99792, 101808, 106656, 114534, 119988, 124432, 130896, 139986, 152712, 159984, 179982, 186648, 199584, 203616, 209979, 229068, 239976, 248864, 261792, 279972, 305424, 319968, 359964, 373296, 419958, 458136, 479952, 559944, 610848, 629937, 719928, 746592, 839916, 916272, 959904, 1119888, 1259874, 1439856, 1679832, 1832544, 2239776, 2519748, 2879712, 3359664, 5039496, 6719328, 10078992, 20157984]

約数ペア:

[(1, 20157984), (2, 10078992), (3, 6719328), (4, 5039496), (6, 3359664), (7, 2879712), (8, 2519748), (9, 2239776), (11, 1832544), (12, 1679832), (14, 1439856), (16, 1259874), (18, 1119888), (21, 959904), (22, 916272), (24, 839916), (27, 746592), (28, 719928), (32, 629937), (33, 610848), (36, 559944), (42, 479952), (44, 458136), (48, 419958), (54, 373296), (56, 359964), (63, 319968), (66, 305424), (72, 279972), (77, 261792), (81, 248864), (84, 239976), (88, 229068), (96, 209979), (99, 203616), (101, 199584), (108, 186648), (112, 179982), (126, 159984), (132, 152712), (144, 139986), (154, 130896), (162, 124432), (168, 119988), (176, 114534), (189, 106656), (198, 101808), (202, 99792), (216, 93324), (224, 89991), (231, 87264), (252, 79992), (264, 76356), (288, 69993), (297, 67872), (303, 66528), (308, 65448), (324, 62216), (336, 59994), (352, 57267), (378, 53328), (396, 50904), (404, 49896), (432, 46662), (462, 43632), (504, 39996), (528, 38178), (567, 35552), (594, 33936), (606, 33264), (616, 32724), (648, 31108), (672, 29997), (693, 29088), (707, 28512), (756, 26664), (792, 25452), (808, 24948), (864, 23331), (891, 22624), (909, 22176), (924, 21816), (1008, 19998), (1056, 19089), (1111, 18144), (1134, 17776), (1188, 16968), (1212, 16632), (1232, 16362), (1296, 15554), (1386, 14544), (1414, 14256), (1512, 13332), (1584, 12726), (1616, 12474), (1782, 11312), (1818, 11088), (1848, 10908), (2016, 9999), (2079, 9696), (2121, 9504), (2222, 9072), (2268, 8888), (2376, 8484), (2424, 8316), (2464, 8181), (2592, 7777), (2727, 7392), (2772, 7272), (2828, 7128), (3024, 6666), (3168, 6363), (3232, 6237), (3333, 6048), (3564, 5656), (3636, 5544), (3696, 5454), (4158, 4848), (4242, 4752), (4444, 4536)]