21389256

素因数分解:

$2^3\times 3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^2$

素因数の和:124

約数の個数: 144

約数和(自身を含む): 70237440

約数和(自身を除く): 48848184

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 31, 36, 37, 42, 56, 62, 63, 72, 74, 84, 93, 111, 124, 126, 148, 168, 186, 217, 222, 248, 252, 259, 279, 296, 333, 372, 434, 444, 504, 518, 558, 651, 666, 744, 777, 868, 888, 1036, 1116, 1147, 1302, 1332, 1369, 1554, 1736, 1953, 2072, 2232, 2294, 2331, 2604, 2664, 2738, 3108, 3441, 3906, 4107, 4588, 4662, 5208, 5476, 6216, 6882, 7812, 8029, 8214, 9176, 9324, 9583, 10323, 10952, 12321, 13764, 15624, 16058, 16428, 18648, 19166, 20646, 24087, 24642, 27528, 28749, 32116, 32856, 38332, 41292, 42439, 48174, 49284, 57498, 64232, 72261, 76664, 82584, 84878, 86247, 96348, 98568, 114996, 127317, 144522, 169756, 172494, 192696, 229992, 254634, 289044, 297073, 339512, 344988, 381951, 509268, 578088, 594146, 689976, 763902, 891219, 1018536, 1188292, 1527804, 1782438, 2376584, 2673657, 3055608, 3564876, 5347314, 7129752, 10694628, 21389256]

約数ペア:

[(1, 21389256), (2, 10694628), (3, 7129752), (4, 5347314), (6, 3564876), (7, 3055608), (8, 2673657), (9, 2376584), (12, 1782438), (14, 1527804), (18, 1188292), (21, 1018536), (24, 891219), (28, 763902), (31, 689976), (36, 594146), (37, 578088), (42, 509268), (56, 381951), (62, 344988), (63, 339512), (72, 297073), (74, 289044), (84, 254634), (93, 229992), (111, 192696), (124, 172494), (126, 169756), (148, 144522), (168, 127317), (186, 114996), (217, 98568), (222, 96348), (248, 86247), (252, 84878), (259, 82584), (279, 76664), (296, 72261), (333, 64232), (372, 57498), (434, 49284), (444, 48174), (504, 42439), (518, 41292), (558, 38332), (651, 32856), (666, 32116), (744, 28749), (777, 27528), (868, 24642), (888, 24087), (1036, 20646), (1116, 19166), (1147, 18648), (1302, 16428), (1332, 16058), (1369, 15624), (1554, 13764), (1736, 12321), (1953, 10952), (2072, 10323), (2232, 9583), (2294, 9324), (2331, 9176), (2604, 8214), (2664, 8029), (2738, 7812), (3108, 6882), (3441, 6216), (3906, 5476), (4107, 5208), (4588, 4662)]