20813985

素因数分解:

$3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5197}}^1$

素因数の和:5297

約数の個数: 24

約数和(自身を含む): 36489960

約数和(自身を除く): 15675975

約数列:

[1, 3, 5, 9, 15, 45, 89, 267, 445, 801, 1335, 4005, 5197, 15591, 25985, 46773, 77955, 233865, 462533, 1387599, 2312665, 4162797, 6937995, 20813985]

約数ペア:

[(1, 20813985), (3, 6937995), (5, 4162797), (9, 2312665), (15, 1387599), (45, 462533), (89, 233865), (267, 77955), (445, 46773), (801, 25985), (1335, 15591), (4005, 5197)]