21312790

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{34939}}^1$

素因数の和:35007

約数の個数: 16

約数和(自身を含む): 38993040

約数和(自身を除く): 17680250

約数列:

[1, 2, 5, 10, 61, 122, 305, 610, 34939, 69878, 174695, 349390, 2131279, 4262558, 10656395, 21312790]

約数ペア:

[(1, 21312790), (2, 10656395), (5, 4262558), (10, 2131279), (61, 349390), (122, 174695), (305, 69878), (610, 34939)]