21477825

素因数分解:

$3^3\times 5^2\times {\mathrm{47}}^1\times {\mathrm{677}}^1$

素因数の和:743

約数の個数: 48

約数和(自身を含む): 40354560

約数和(自身を除く): 18876735

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 47, 75, 135, 141, 225, 235, 423, 675, 677, 705, 1175, 1269, 2031, 2115, 3385, 3525, 6093, 6345, 10155, 10575, 16925, 18279, 30465, 31725, 31819, 50775, 91395, 95457, 152325, 159095, 286371, 456975, 477285, 795475, 859113, 1431855, 2386425, 4295565, 7159275, 21477825]

約数ペア:

[(1, 21477825), (3, 7159275), (5, 4295565), (9, 2386425), (15, 1431855), (25, 859113), (27, 795475), (45, 477285), (47, 456975), (75, 286371), (135, 159095), (141, 152325), (225, 95457), (235, 91395), (423, 50775), (675, 31819), (677, 31725), (705, 30465), (1175, 18279), (1269, 16925), (2031, 10575), (2115, 10155), (3385, 6345), (3525, 6093)]