20520801

素因数分解:

$3^2\times 7^1\times {\mathrm{307}}^1\times {\mathrm{1061}}^1$

素因数の和:1381

約数の個数: 24

約数和(自身を含む): 34017984

約数和(自身を除く): 13497183

約数列:

[1, 3, 7, 9, 21, 63, 307, 921, 1061, 2149, 2763, 3183, 6447, 7427, 9549, 19341, 22281, 66843, 325727, 977181, 2280089, 2931543, 6840267, 20520801]

約数ペア:

[(1, 20520801), (3, 6840267), (7, 2931543), (9, 2280089), (21, 977181), (63, 325727), (307, 66843), (921, 22281), (1061, 19341), (2149, 9549), (2763, 7427), (3183, 6447)]