21921710

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27749}}^1$

素因数の和:27835

約数の個数: 16

約数和(自身を含む): 39960000

約数和(自身を除く): 18038290

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27749, 55498, 138745, 277490, 2192171, 4384342, 10960855, 21921710]

約数ペア:

[(1, 21921710), (2, 10960855), (5, 4384342), (10, 2192171), (79, 277490), (158, 138745), (395, 55498), (790, 27749)]