21371120

素因数分解:

$2^4\times 5^1\times {\mathrm{267139}}^1$

素因数の和:267152

約数の個数: 20

約数和(自身を含む): 49688040

約数和(自身を除く): 28316920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267139, 534278, 1068556, 1335695, 2137112, 2671390, 4274224, 5342780, 10685560, 21371120]

約数ペア:

[(1, 21371120), (2, 10685560), (4, 5342780), (5, 4274224), (8, 2671390), (10, 2137112), (16, 1335695), (20, 1068556), (40, 534278), (80, 267139)]