28317880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{557}}^1$

素因数の和:640

約数の個数: 64

約数和(自身を含む): 67495680

約数和(自身を除く): 39177800

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 41, 62, 82, 124, 155, 164, 205, 248, 310, 328, 410, 557, 620, 820, 1114, 1240, 1271, 1640, 2228, 2542, 2785, 4456, 5084, 5570, 6355, 10168, 11140, 12710, 17267, 22280, 22837, 25420, 34534, 45674, 50840, 69068, 86335, 91348, 114185, 138136, 172670, 182696, 228370, 345340, 456740, 690680, 707947, 913480, 1415894, 2831788, 3539735, 5663576, 7079470, 14158940, 28317880]

約数ペア:

[(1, 28317880), (2, 14158940), (4, 7079470), (5, 5663576), (8, 3539735), (10, 2831788), (20, 1415894), (31, 913480), (40, 707947), (41, 690680), (62, 456740), (82, 345340), (124, 228370), (155, 182696), (164, 172670), (205, 138136), (248, 114185), (310, 91348), (328, 86335), (410, 69068), (557, 50840), (620, 45674), (820, 34534), (1114, 25420), (1240, 22837), (1271, 22280), (1640, 17267), (2228, 12710), (2542, 11140), (2785, 10168), (4456, 6355), (5084, 5570)]