21017620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{229}}^1\times {\mathrm{353}}^1$

素因数の和:604

約数の個数: 48

約数和(自身を含む): 47874960

約数和(自身を除く): 26857340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 229, 260, 353, 458, 706, 916, 1145, 1412, 1765, 2290, 2977, 3530, 4580, 4589, 5954, 7060, 9178, 11908, 14885, 18356, 22945, 29770, 45890, 59540, 80837, 91780, 161674, 323348, 404185, 808370, 1050881, 1616740, 2101762, 4203524, 5254405, 10508810, 21017620]

約数ペア:

[(1, 21017620), (2, 10508810), (4, 5254405), (5, 4203524), (10, 2101762), (13, 1616740), (20, 1050881), (26, 808370), (52, 404185), (65, 323348), (130, 161674), (229, 91780), (260, 80837), (353, 59540), (458, 45890), (706, 29770), (916, 22945), (1145, 18356), (1412, 14885), (1765, 11908), (2290, 9178), (2977, 7060), (3530, 5954), (4580, 4589)]