201521780

素因数分解:

$2^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{181}}^1\times {\mathrm{311}}^1$

素因数の和:680

約数の個数: 48

約数和(自身を含む): 429287040

約数和(自身を除く): 227765260

約数列:

[1, 2, 4, 5, 10, 20, 179, 181, 311, 358, 362, 622, 716, 724, 895, 905, 1244, 1555, 1790, 1810, 3110, 3580, 3620, 6220, 32399, 55669, 56291, 64798, 111338, 112582, 129596, 161995, 222676, 225164, 278345, 281455, 323990, 556690, 562910, 647980, 1113380, 1125820, 10076089, 20152178, 40304356, 50380445, 100760890, 201521780]

約数ペア:

[(1, 201521780), (2, 100760890), (4, 50380445), (5, 40304356), (10, 20152178), (20, 10076089), (179, 1125820), (181, 1113380), (311, 647980), (358, 562910), (362, 556690), (622, 323990), (716, 281455), (724, 278345), (895, 225164), (905, 222676), (1244, 161995), (1555, 129596), (1790, 112582), (1810, 111338), (3110, 64798), (3580, 56291), (3620, 55669), (6220, 32399)]