81457580

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{193}}^1\times {\mathrm{449}}^1$

素因数の和:698

約数の個数: 48

約数和(自身を含む): 175996800

約数和(自身を除く): 94539220

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 193, 235, 386, 449, 470, 772, 898, 940, 965, 1796, 1930, 2245, 3860, 4490, 8980, 9071, 18142, 21103, 36284, 42206, 45355, 84412, 86657, 90710, 105515, 173314, 181420, 211030, 346628, 422060, 433285, 866570, 1733140, 4072879, 8145758, 16291516, 20364395, 40728790, 81457580]

約数ペア:

[(1, 81457580), (2, 40728790), (4, 20364395), (5, 16291516), (10, 8145758), (20, 4072879), (47, 1733140), (94, 866570), (188, 433285), (193, 422060), (235, 346628), (386, 211030), (449, 181420), (470, 173314), (772, 105515), (898, 90710), (940, 86657), (965, 84412), (1796, 45355), (1930, 42206), (2245, 36284), (3860, 21103), (4490, 18142), (8980, 9071)]