21951643

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{509}}^1$

素因数の和:678

約数の個数: 16

約数和(自身を含む): 25801920

約数和(自身を除く): 3850277

約数列:

[1, 7, 61, 101, 427, 509, 707, 3563, 6161, 31049, 43127, 51409, 217343, 359863, 3135949, 21951643]

約数ペア:

[(1, 21951643), (7, 3135949), (61, 359863), (101, 217343), (427, 51409), (509, 43127), (707, 31049), (3563, 6161)]