21388055

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{7001}}^1$

素因数の和:7066

約数の個数: 16

約数和(自身を含む): 28232064

約数和(自身を除く): 6844009

約数列:

[1, 5, 13, 47, 65, 235, 611, 3055, 7001, 35005, 91013, 329047, 455065, 1645235, 4277611, 21388055]

約数ペア:

[(1, 21388055), (5, 4277611), (13, 1645235), (47, 455065), (65, 329047), (235, 91013), (611, 35005), (3055, 7001)]