21441580

素因数分解:

$2^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1657}}^1$

素因数の和:2313

約数の個数: 24

約数和(自身を含む): 45124128

約数和(自身を除く): 23682548

約数列:

[1, 2, 4, 5, 10, 20, 647, 1294, 1657, 2588, 3235, 3314, 6470, 6628, 8285, 12940, 16570, 33140, 1072079, 2144158, 4288316, 5360395, 10720790, 21441580]

約数ペア:

[(1, 21441580), (2, 10720790), (4, 5360395), (5, 4288316), (10, 2144158), (20, 1072079), (647, 33140), (1294, 16570), (1657, 12940), (2588, 8285), (3235, 6628), (3314, 6470)]