21531420

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13291}}^1$

素因数の和:13312

約数の個数: 60

約数和(自身を含む): 67549944

約数和(自身を除く): 46018524

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 810, 1620, 13291, 26582, 39873, 53164, 66455, 79746, 119619, 132910, 159492, 199365, 239238, 265820, 358857, 398730, 478476, 598095, 717714, 797460, 1076571, 1196190, 1435428, 1794285, 2153142, 2392380, 3588570, 4306284, 5382855, 7177140, 10765710, 21531420]

約数ペア:

[(1, 21531420), (2, 10765710), (3, 7177140), (4, 5382855), (5, 4306284), (6, 3588570), (9, 2392380), (10, 2153142), (12, 1794285), (15, 1435428), (18, 1196190), (20, 1076571), (27, 797460), (30, 717714), (36, 598095), (45, 478476), (54, 398730), (60, 358857), (81, 265820), (90, 239238), (108, 199365), (135, 159492), (162, 132910), (180, 119619), (270, 79746), (324, 66455), (405, 53164), (540, 39873), (810, 26582), (1620, 13291)]