21521808

素因数分解:

$2^4\times 3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{647}}^1$

素因数の和:682

約数の個数: 160

約数和(自身を含む): 77137920

約数和(自身を除く): 55616112

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 14, 16, 18, 21, 22, 24, 27, 28, 33, 36, 42, 44, 48, 54, 56, 63, 66, 72, 77, 84, 88, 99, 108, 112, 126, 132, 144, 154, 168, 176, 189, 198, 216, 231, 252, 264, 297, 308, 336, 378, 396, 432, 462, 504, 528, 594, 616, 647, 693, 756, 792, 924, 1008, 1188, 1232, 1294, 1386, 1512, 1584, 1848, 1941, 2079, 2376, 2588, 2772, 3024, 3696, 3882, 4158, 4529, 4752, 5176, 5544, 5823, 7117, 7764, 8316, 9058, 10352, 11088, 11646, 13587, 14234, 15528, 16632, 17469, 18116, 21351, 23292, 27174, 28468, 31056, 33264, 34938, 36232, 40761, 42702, 46584, 49819, 54348, 56936, 64053, 69876, 72464, 81522, 85404, 93168, 99638, 108696, 113872, 122283, 128106, 139752, 149457, 163044, 170808, 192159, 199276, 217392, 244566, 256212, 279504, 298914, 326088, 341616, 384318, 398552, 448371, 489132, 512424, 597828, 652176, 768636, 797104, 896742, 978264, 1024848, 1195656, 1345113, 1537272, 1793484, 1956528, 2391312, 2690226, 3074544, 3586968, 5380452, 7173936, 10760904, 21521808]

約数ペア:

[(1, 21521808), (2, 10760904), (3, 7173936), (4, 5380452), (6, 3586968), (7, 3074544), (8, 2690226), (9, 2391312), (11, 1956528), (12, 1793484), (14, 1537272), (16, 1345113), (18, 1195656), (21, 1024848), (22, 978264), (24, 896742), (27, 797104), (28, 768636), (33, 652176), (36, 597828), (42, 512424), (44, 489132), (48, 448371), (54, 398552), (56, 384318), (63, 341616), (66, 326088), (72, 298914), (77, 279504), (84, 256212), (88, 244566), (99, 217392), (108, 199276), (112, 192159), (126, 170808), (132, 163044), (144, 149457), (154, 139752), (168, 128106), (176, 122283), (189, 113872), (198, 108696), (216, 99638), (231, 93168), (252, 85404), (264, 81522), (297, 72464), (308, 69876), (336, 64053), (378, 56936), (396, 54348), (432, 49819), (462, 46584), (504, 42702), (528, 40761), (594, 36232), (616, 34938), (647, 33264), (693, 31056), (756, 28468), (792, 27174), (924, 23292), (1008, 21351), (1188, 18116), (1232, 17469), (1294, 16632), (1386, 15528), (1512, 14234), (1584, 13587), (1848, 11646), (1941, 11088), (2079, 10352), (2376, 9058), (2588, 8316), (2772, 7764), (3024, 7117), (3696, 5823), (3882, 5544), (4158, 5176), (4529, 4752)]