21426640

素因数分解:

$2^4\times 5^1\times {\mathrm{267833}}^1$

素因数の和:267846

約数の個数: 20

約数和(自身を含む): 49817124

約数和(自身を除く): 28390484

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267833, 535666, 1071332, 1339165, 2142664, 2678330, 4285328, 5356660, 10713320, 21426640]

約数ペア:

[(1, 21426640), (2, 10713320), (4, 5356660), (5, 4285328), (8, 2678330), (10, 2142664), (16, 1339165), (20, 1071332), (40, 535666), (80, 267833)]