20717928

素因数分解:

$2^3\times 3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:168

約数の個数: 192

約数和(自身を含む): 72558720

約数和(自身を除く): 51840792

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 14, 18, 21, 22, 24, 28, 33, 36, 37, 42, 44, 56, 63, 66, 72, 74, 77, 84, 88, 99, 101, 111, 126, 132, 148, 154, 168, 198, 202, 222, 231, 252, 259, 264, 296, 303, 308, 333, 396, 404, 407, 444, 462, 504, 518, 606, 616, 666, 693, 707, 777, 792, 808, 814, 888, 909, 924, 1036, 1111, 1212, 1221, 1332, 1386, 1414, 1554, 1628, 1818, 1848, 2072, 2121, 2222, 2331, 2424, 2442, 2664, 2772, 2828, 2849, 3108, 3256, 3333, 3636, 3663, 3737, 4242, 4444, 4662, 4884, 5544, 5656, 5698, 6216, 6363, 6666, 7272, 7326, 7474, 7777, 8484, 8547, 8888, 9324, 9768, 9999, 11211, 11396, 12726, 13332, 14652, 14948, 15554, 16968, 17094, 18648, 19998, 22422, 22792, 23331, 25452, 25641, 26159, 26664, 29304, 29896, 31108, 33633, 34188, 39996, 41107, 44844, 46662, 50904, 51282, 52318, 62216, 67266, 68376, 69993, 78477, 79992, 82214, 89688, 93324, 102564, 104636, 123321, 134532, 139986, 156954, 164428, 186648, 205128, 209272, 235431, 246642, 269064, 279972, 287749, 313908, 328856, 369963, 470862, 493284, 559944, 575498, 627816, 739926, 863247, 941724, 986568, 1150996, 1479852, 1726494, 1883448, 2301992, 2589741, 2959704, 3452988, 5179482, 6905976, 10358964, 20717928]

約数ペア:

[(1, 20717928), (2, 10358964), (3, 6905976), (4, 5179482), (6, 3452988), (7, 2959704), (8, 2589741), (9, 2301992), (11, 1883448), (12, 1726494), (14, 1479852), (18, 1150996), (21, 986568), (22, 941724), (24, 863247), (28, 739926), (33, 627816), (36, 575498), (37, 559944), (42, 493284), (44, 470862), (56, 369963), (63, 328856), (66, 313908), (72, 287749), (74, 279972), (77, 269064), (84, 246642), (88, 235431), (99, 209272), (101, 205128), (111, 186648), (126, 164428), (132, 156954), (148, 139986), (154, 134532), (168, 123321), (198, 104636), (202, 102564), (222, 93324), (231, 89688), (252, 82214), (259, 79992), (264, 78477), (296, 69993), (303, 68376), (308, 67266), (333, 62216), (396, 52318), (404, 51282), (407, 50904), (444, 46662), (462, 44844), (504, 41107), (518, 39996), (606, 34188), (616, 33633), (666, 31108), (693, 29896), (707, 29304), (777, 26664), (792, 26159), (808, 25641), (814, 25452), (888, 23331), (909, 22792), (924, 22422), (1036, 19998), (1111, 18648), (1212, 17094), (1221, 16968), (1332, 15554), (1386, 14948), (1414, 14652), (1554, 13332), (1628, 12726), (1818, 11396), (1848, 11211), (2072, 9999), (2121, 9768), (2222, 9324), (2331, 8888), (2424, 8547), (2442, 8484), (2664, 7777), (2772, 7474), (2828, 7326), (2849, 7272), (3108, 6666), (3256, 6363), (3333, 6216), (3636, 5698), (3663, 5656), (3737, 5544), (4242, 4884), (4444, 4662)]