21907256

素因数分解:

$2^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:256

約数の個数: 64

約数和(自身を含む): 49156800

約数和(自身を除く): 27249544

約数列:

[1, 2, 4, 7, 8, 14, 28, 37, 56, 74, 97, 109, 148, 194, 218, 259, 296, 388, 436, 518, 679, 763, 776, 872, 1036, 1358, 1526, 2072, 2716, 3052, 3589, 4033, 5432, 6104, 7178, 8066, 10573, 14356, 16132, 21146, 25123, 28231, 28712, 32264, 42292, 50246, 56462, 74011, 84584, 100492, 112924, 148022, 200984, 225848, 296044, 391201, 592088, 782402, 1564804, 2738407, 3129608, 5476814, 10953628, 21907256]

約数ペア:

[(1, 21907256), (2, 10953628), (4, 5476814), (7, 3129608), (8, 2738407), (14, 1564804), (28, 782402), (37, 592088), (56, 391201), (74, 296044), (97, 225848), (109, 200984), (148, 148022), (194, 112924), (218, 100492), (259, 84584), (296, 74011), (388, 56462), (436, 50246), (518, 42292), (679, 32264), (763, 28712), (776, 28231), (872, 25123), (1036, 21146), (1358, 16132), (1526, 14356), (2072, 10573), (2716, 8066), (3052, 7178), (3589, 6104), (4033, 5432)]