21515570

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{541}}^1$

素因数の和:686

約数の個数: 32

約数和(自身を含む): 40155696

約数和(自身を除く): 18640126

約数列:

[1, 2, 5, 10, 41, 82, 97, 194, 205, 410, 485, 541, 970, 1082, 2705, 3977, 5410, 7954, 19885, 22181, 39770, 44362, 52477, 104954, 110905, 221810, 262385, 524770, 2151557, 4303114, 10757785, 21515570]

約数ペア:

[(1, 21515570), (2, 10757785), (5, 4303114), (10, 2151557), (41, 524770), (82, 262385), (97, 221810), (194, 110905), (205, 104954), (410, 52477), (485, 44362), (541, 39770), (970, 22181), (1082, 19885), (2705, 7954), (3977, 5410)]