399990199

素因数分解:

$7^1\times {\mathrm{101}}^1\times {\mathrm{199}}^1\times {\mathrm{2843}}^1$

素因数の和:3150

約数の個数: 16

約数和(自身を含む): 464140800

約数和(自身を除く): 64150601

約数列:

[1, 7, 101, 199, 707, 1393, 2843, 19901, 20099, 140693, 287143, 565757, 2010001, 3960299, 57141457, 399990199]

約数ペア:

[(1, 399990199), (7, 57141457), (101, 3960299), (199, 2010001), (707, 565757), (1393, 287143), (2843, 140693), (19901, 20099)]