21159635

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{677}}^1$

素因数の和:755

約数の個数: 32

約数和(自身を含む): 31242240

約数和(自身を除く): 10082605

約数列:

[1, 5, 7, 19, 35, 47, 95, 133, 235, 329, 665, 677, 893, 1645, 3385, 4465, 4739, 6251, 12863, 23695, 31255, 31819, 64315, 90041, 159095, 222733, 450205, 604561, 1113665, 3022805, 4231927, 21159635]

約数ペア:

[(1, 21159635), (5, 4231927), (7, 3022805), (19, 1113665), (35, 604561), (47, 450205), (95, 222733), (133, 159095), (235, 90041), (329, 64315), (665, 31819), (677, 31255), (893, 23695), (1645, 12863), (3385, 6251), (4465, 4739)]