20961975

素因数分解:

$3^1\times 5^2\times {\mathrm{277}}^1\times {\mathrm{1009}}^1$

素因数の和:1299

約数の個数: 24

約数和(自身を含む): 34816720

約数和(自身を除く): 13854745

約数列:

[1, 3, 5, 15, 25, 75, 277, 831, 1009, 1385, 3027, 4155, 5045, 6925, 15135, 20775, 25225, 75675, 279493, 838479, 1397465, 4192395, 6987325, 20961975]

約数ペア:

[(1, 20961975), (3, 6987325), (5, 4192395), (15, 1397465), (25, 838479), (75, 279493), (277, 75675), (831, 25225), (1009, 20775), (1385, 15135), (3027, 6925), (4155, 5045)]