20288475

素因数分解:

$3^4\times 5^2\times {\mathrm{43}}^1\times {\mathrm{233}}^1$

素因数の和:298

約数の個数: 60

約数和(自身を含む): 38620296

約数和(自身を除く): 18331821

約数列:

[1, 3, 5, 9, 15, 25, 27, 43, 45, 75, 81, 129, 135, 215, 225, 233, 387, 405, 645, 675, 699, 1075, 1161, 1165, 1935, 2025, 2097, 3225, 3483, 3495, 5805, 5825, 6291, 9675, 10019, 10485, 17415, 17475, 18873, 29025, 30057, 31455, 50095, 52425, 87075, 90171, 94365, 150285, 157275, 250475, 270513, 450855, 471825, 751425, 811539, 1352565, 2254275, 4057695, 6762825, 20288475]

約数ペア:

[(1, 20288475), (3, 6762825), (5, 4057695), (9, 2254275), (15, 1352565), (25, 811539), (27, 751425), (43, 471825), (45, 450855), (75, 270513), (81, 250475), (129, 157275), (135, 150285), (215, 94365), (225, 90171), (233, 87075), (387, 52425), (405, 50095), (645, 31455), (675, 30057), (699, 29025), (1075, 18873), (1161, 17475), (1165, 17415), (1935, 10485), (2025, 10019), (2097, 9675), (3225, 6291), (3483, 5825), (3495, 5805)]