20903840

素因数分解:

$2^5\times 5^1\times {\mathrm{130649}}^1$

素因数の和:130664

約数の個数: 24

約数和(自身を含む): 49385700

約数和(自身を除く): 28481860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 130649, 261298, 522596, 653245, 1045192, 1306490, 2090384, 2612980, 4180768, 5225960, 10451920, 20903840]

約数ペア:

[(1, 20903840), (2, 10451920), (4, 5225960), (5, 4180768), (8, 2612980), (10, 2090384), (16, 1306490), (20, 1045192), (32, 653245), (40, 522596), (80, 261298), (160, 130649)]