20585175

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{491}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 37580928

約数和(自身を除く): 16995753

約数列:

[1, 3, 5, 13, 15, 25, 39, 43, 65, 75, 129, 195, 215, 325, 491, 559, 645, 975, 1075, 1473, 1677, 2455, 2795, 3225, 6383, 7365, 8385, 12275, 13975, 19149, 21113, 31915, 36825, 41925, 63339, 95745, 105565, 159575, 274469, 316695, 478725, 527825, 823407, 1372345, 1583475, 4117035, 6861725, 20585175]

約数ペア:

[(1, 20585175), (3, 6861725), (5, 4117035), (13, 1583475), (15, 1372345), (25, 823407), (39, 527825), (43, 478725), (65, 316695), (75, 274469), (129, 159575), (195, 105565), (215, 95745), (325, 63339), (491, 41925), (559, 36825), (645, 31915), (975, 21113), (1075, 19149), (1473, 13975), (1677, 12275), (2455, 8385), (2795, 7365), (3225, 6383)]