21439810

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{3877}}^1$

素因数の和:3970

約数の個数: 32

約数和(自身を含む): 44674560

約数和(自身を除く): 23234750

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 79, 158, 395, 553, 790, 1106, 2765, 3877, 5530, 7754, 19385, 27139, 38770, 54278, 135695, 271390, 306283, 612566, 1531415, 2143981, 3062830, 4287962, 10719905, 21439810]

約数ペア:

[(1, 21439810), (2, 10719905), (5, 4287962), (7, 3062830), (10, 2143981), (14, 1531415), (35, 612566), (70, 306283), (79, 271390), (158, 135695), (395, 54278), (553, 38770), (790, 27139), (1106, 19385), (2765, 7754), (3877, 5530)]