21370480

素因数分解:

$2^4\times 5^1\times {\mathrm{267131}}^1$

素因数の和:267144

約数の個数: 20

約数和(自身を含む): 49686552

約数和(自身を除く): 28316072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267131, 534262, 1068524, 1335655, 2137048, 2671310, 4274096, 5342620, 10685240, 21370480]

約数ペア:

[(1, 21370480), (2, 10685240), (4, 5342620), (5, 4274096), (8, 2671310), (10, 2137048), (16, 1335655), (20, 1068524), (40, 534262), (80, 267131)]