21515560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{457}}^1$

素因数の和:586

約数の個数: 64

約数和(自身を含む): 53421120

約数和(自身を除く): 31905560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 107, 110, 214, 220, 428, 440, 457, 535, 856, 914, 1070, 1177, 1828, 2140, 2285, 2354, 3656, 4280, 4570, 4708, 5027, 5885, 9140, 9416, 10054, 11770, 18280, 20108, 23540, 25135, 40216, 47080, 48899, 50270, 97798, 100540, 195596, 201080, 244495, 391192, 488990, 537889, 977980, 1075778, 1955960, 2151556, 2689445, 4303112, 5378890, 10757780, 21515560]

約数ペア:

[(1, 21515560), (2, 10757780), (4, 5378890), (5, 4303112), (8, 2689445), (10, 2151556), (11, 1955960), (20, 1075778), (22, 977980), (40, 537889), (44, 488990), (55, 391192), (88, 244495), (107, 201080), (110, 195596), (214, 100540), (220, 97798), (428, 50270), (440, 48899), (457, 47080), (535, 40216), (856, 25135), (914, 23540), (1070, 20108), (1177, 18280), (1828, 11770), (2140, 10054), (2285, 9416), (2354, 9140), (3656, 5885), (4280, 5027), (4570, 4708)]