81356560

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{367}}^1$

素因数の和:560

約数の個数: 80

約数和(自身を含む): 202058496

約数和(自身を除く): 120701936

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 163, 170, 272, 326, 340, 367, 652, 680, 734, 815, 1304, 1360, 1468, 1630, 1835, 2608, 2771, 2936, 3260, 3670, 5542, 5872, 6239, 6520, 7340, 11084, 12478, 13040, 13855, 14680, 22168, 24956, 27710, 29360, 31195, 44336, 49912, 55420, 59821, 62390, 99824, 110840, 119642, 124780, 221680, 239284, 249560, 299105, 478568, 499120, 598210, 957136, 1016957, 1196420, 2033914, 2392840, 4067828, 4785680, 5084785, 8135656, 10169570, 16271312, 20339140, 40678280, 81356560]

約数ペア:

[(1, 81356560), (2, 40678280), (4, 20339140), (5, 16271312), (8, 10169570), (10, 8135656), (16, 5084785), (17, 4785680), (20, 4067828), (34, 2392840), (40, 2033914), (68, 1196420), (80, 1016957), (85, 957136), (136, 598210), (163, 499120), (170, 478568), (272, 299105), (326, 249560), (340, 239284), (367, 221680), (652, 124780), (680, 119642), (734, 110840), (815, 99824), (1304, 62390), (1360, 59821), (1468, 55420), (1630, 49912), (1835, 44336), (2608, 31195), (2771, 29360), (2936, 27710), (3260, 24956), (3670, 22168), (5542, 14680), (5872, 13855), (6239, 13040), (6520, 12478), (7340, 11084)]