21059896

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{449}}^1$

素因数の和:520

約数の個数: 64

約数和(自身を含む): 47628000

約数和(自身を除く): 26568104

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 41, 44, 52, 82, 88, 104, 143, 164, 286, 328, 449, 451, 533, 572, 898, 902, 1066, 1144, 1796, 1804, 2132, 3592, 3608, 4264, 4939, 5837, 5863, 9878, 11674, 11726, 18409, 19756, 23348, 23452, 36818, 39512, 46696, 46904, 64207, 73636, 128414, 147272, 202499, 239317, 256828, 404998, 478634, 513656, 809996, 957268, 1619992, 1914536, 2632487, 5264974, 10529948, 21059896]

約数ペア:

[(1, 21059896), (2, 10529948), (4, 5264974), (8, 2632487), (11, 1914536), (13, 1619992), (22, 957268), (26, 809996), (41, 513656), (44, 478634), (52, 404998), (82, 256828), (88, 239317), (104, 202499), (143, 147272), (164, 128414), (286, 73636), (328, 64207), (449, 46904), (451, 46696), (533, 39512), (572, 36818), (898, 23452), (902, 23348), (1066, 19756), (1144, 18409), (1796, 11726), (1804, 11674), (2132, 9878), (3592, 5863), (3608, 5837), (4264, 4939)]