20989360

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1013}}^1$

素因数の和:1070

約数の個数: 80

約数和(自身を含む): 57335616

約数和(自身を除く): 36346256

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 185, 259, 280, 296, 370, 518, 560, 592, 740, 1013, 1036, 1295, 1480, 2026, 2072, 2590, 2960, 4052, 4144, 5065, 5180, 7091, 8104, 10130, 10360, 14182, 16208, 20260, 20720, 28364, 35455, 37481, 40520, 56728, 70910, 74962, 81040, 113456, 141820, 149924, 187405, 262367, 283640, 299848, 374810, 524734, 567280, 599696, 749620, 1049468, 1311835, 1499240, 2098936, 2623670, 2998480, 4197872, 5247340, 10494680, 20989360]

約数ペア:

[(1, 20989360), (2, 10494680), (4, 5247340), (5, 4197872), (7, 2998480), (8, 2623670), (10, 2098936), (14, 1499240), (16, 1311835), (20, 1049468), (28, 749620), (35, 599696), (37, 567280), (40, 524734), (56, 374810), (70, 299848), (74, 283640), (80, 262367), (112, 187405), (140, 149924), (148, 141820), (185, 113456), (259, 81040), (280, 74962), (296, 70910), (370, 56728), (518, 40520), (560, 37481), (592, 35455), (740, 28364), (1013, 20720), (1036, 20260), (1295, 16208), (1480, 14182), (2026, 10360), (2072, 10130), (2590, 8104), (2960, 7091), (4052, 5180), (4144, 5065)]