20018475

素因数分解:

$3^3\times 5^2\times {\mathrm{47}}^1\times {\mathrm{631}}^1$

素因数の和:697

約数の個数: 48

約数和(自身を含む): 37616640

約数和(自身を除く): 17598165

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 47, 75, 135, 141, 225, 235, 423, 631, 675, 705, 1175, 1269, 1893, 2115, 3155, 3525, 5679, 6345, 9465, 10575, 15775, 17037, 28395, 29657, 31725, 47325, 85185, 88971, 141975, 148285, 266913, 425925, 444855, 741425, 800739, 1334565, 2224275, 4003695, 6672825, 20018475]

約数ペア:

[(1, 20018475), (3, 6672825), (5, 4003695), (9, 2224275), (15, 1334565), (25, 800739), (27, 741425), (45, 444855), (47, 425925), (75, 266913), (135, 148285), (141, 141975), (225, 88971), (235, 85185), (423, 47325), (631, 31725), (675, 29657), (705, 28395), (1175, 17037), (1269, 15775), (1893, 10575), (2115, 9465), (3155, 6345), (3525, 5679)]