21358240

素因数分解:

$2^5\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1019}}^1$

素因数の和:1165

約数の個数: 48

約数和(自身を含む): 50893920

約数和(自身を除く): 29535680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 131, 160, 262, 524, 655, 1019, 1048, 1310, 2038, 2096, 2620, 4076, 4192, 5095, 5240, 8152, 10190, 10480, 16304, 20380, 20960, 32608, 40760, 81520, 133489, 163040, 266978, 533956, 667445, 1067912, 1334890, 2135824, 2669780, 4271648, 5339560, 10679120, 21358240]

約数ペア:

[(1, 21358240), (2, 10679120), (4, 5339560), (5, 4271648), (8, 2669780), (10, 2135824), (16, 1334890), (20, 1067912), (32, 667445), (40, 533956), (80, 266978), (131, 163040), (160, 133489), (262, 81520), (524, 40760), (655, 32608), (1019, 20960), (1048, 20380), (1310, 16304), (2038, 10480), (2096, 10190), (2620, 8152), (4076, 5240), (4192, 5095)]