21467440

素因数分解:

$2^4\times 5^1\times {\mathrm{268343}}^1$

素因数の和:268356

約数の個数: 20

約数和(自身を含む): 49911984

約数和(自身を除く): 28444544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268343, 536686, 1073372, 1341715, 2146744, 2683430, 4293488, 5366860, 10733720, 21467440]

約数ペア:

[(1, 21467440), (2, 10733720), (4, 5366860), (5, 4293488), (8, 2683430), (10, 2146744), (16, 1341715), (20, 1073372), (40, 536686), (80, 268343)]