21244643

素因数分解:

$7^1\times {\mathrm{101}}^1\times {\mathrm{151}}^1\times {\mathrm{199}}^1$

素因数の和:458

約数の個数: 16

約数和(自身を含む): 24806400

約数和(自身を除く): 3561757

約数列:

[1, 7, 101, 151, 199, 707, 1057, 1393, 15251, 20099, 30049, 106757, 140693, 210343, 3034949, 21244643]

約数ペア:

[(1, 21244643), (7, 3034949), (101, 210343), (151, 140693), (199, 106757), (707, 30049), (1057, 20099), (1393, 15251)]