21940420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15451}}^1$

素因数の和:15531

約数の個数: 24

約数和(自身を含む): 46726848

約数和(自身を除く): 24786428

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15451, 30902, 61804, 77255, 154510, 309020, 1097021, 2194042, 4388084, 5485105, 10970210, 21940420]

約数ペア:

[(1, 21940420), (2, 10970210), (4, 5485105), (5, 4388084), (10, 2194042), (20, 1097021), (71, 309020), (142, 154510), (284, 77255), (355, 61804), (710, 30902), (1420, 15451)]