21151390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{162703}}^1$

素因数の和:162723

約数の個数: 16

約数和(自身を含む): 41001408

約数和(自身を除く): 19850018

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 162703, 325406, 813515, 1627030, 2115139, 4230278, 10575695, 21151390]

約数ペア:

[(1, 21151390), (2, 10575695), (5, 4230278), (10, 2115139), (13, 1627030), (26, 813515), (65, 325406), (130, 162703)]