20216925

素因数分解:

$3^3\times 5^2\times {\mathrm{61}}^1\times {\mathrm{491}}^1$

素因数の和:571

約数の個数: 48

約数和(自身を含む): 37824960

約数和(自身を除く): 17608035

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 61, 75, 135, 183, 225, 305, 491, 549, 675, 915, 1473, 1525, 1647, 2455, 2745, 4419, 4575, 7365, 8235, 12275, 13257, 13725, 22095, 29951, 36825, 41175, 66285, 89853, 110475, 149755, 269559, 331425, 449265, 748775, 808677, 1347795, 2246325, 4043385, 6738975, 20216925]

約数ペア:

[(1, 20216925), (3, 6738975), (5, 4043385), (9, 2246325), (15, 1347795), (25, 808677), (27, 748775), (45, 449265), (61, 331425), (75, 269559), (135, 149755), (183, 110475), (225, 89853), (305, 66285), (491, 41175), (549, 36825), (675, 29951), (915, 22095), (1473, 13725), (1525, 13257), (1647, 12275), (2455, 8235), (2745, 7365), (4419, 4575)]