81601220

素因数分解:

$2^2\times 5^1\times {\mathrm{563}}^1\times {\mathrm{7247}}^1$

素因数の和:7819

約数の個数: 24

約数和(自身を含む): 171690624

約数和(自身を除く): 90089404

約数列:

[1, 2, 4, 5, 10, 20, 563, 1126, 2252, 2815, 5630, 7247, 11260, 14494, 28988, 36235, 72470, 144940, 4080061, 8160122, 16320244, 20400305, 40800610, 81601220]

約数ペア:

[(1, 81601220), (2, 40800610), (4, 20400305), (5, 16320244), (10, 8160122), (20, 4080061), (563, 144940), (1126, 72470), (2252, 36235), (2815, 28988), (5630, 14494), (7247, 11260)]