20502665

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{971}}^1$

素因数の和:1120

約数の個数: 16

約数和(自身を含む): 25474176

約数和(自身を除く): 4971511

約数列:

[1, 5, 41, 103, 205, 515, 971, 4223, 4855, 21115, 39811, 100013, 199055, 500065, 4100533, 20502665]

約数ペア:

[(1, 20502665), (5, 4100533), (41, 500065), (103, 199055), (205, 100013), (515, 39811), (971, 21115), (4223, 4855)]