21070090

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1\times {\mathrm{179}}^1$

素因数の和:414

約数の個数: 32

約数和(自身を含む): 38880000

約数和(自身を除く): 17809910

約数列:

[1, 2, 5, 10, 79, 149, 158, 179, 298, 358, 395, 745, 790, 895, 1490, 1790, 11771, 14141, 23542, 26671, 28282, 53342, 58855, 70705, 117710, 133355, 141410, 266710, 2107009, 4214018, 10535045, 21070090]

約数ペア:

[(1, 21070090), (2, 10535045), (5, 4214018), (10, 2107009), (79, 266710), (149, 141410), (158, 133355), (179, 117710), (298, 70705), (358, 58855), (395, 53342), (745, 28282), (790, 26671), (895, 23542), (1490, 14141), (1790, 11771)]