21105890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{907}}^1$

素因数の和:1106

約数の個数: 32

約数和(自身を含む): 41186880

約数和(自身を除く): 20080990

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 179, 358, 895, 907, 1790, 1814, 2327, 4535, 4654, 9070, 11635, 11791, 23270, 23582, 58955, 117910, 162353, 324706, 811765, 1623530, 2110589, 4221178, 10552945, 21105890]

約数ペア:

[(1, 21105890), (2, 10552945), (5, 4221178), (10, 2110589), (13, 1623530), (26, 811765), (65, 324706), (130, 162353), (179, 117910), (358, 58955), (895, 23582), (907, 23270), (1790, 11791), (1814, 11635), (2327, 9070), (4535, 4654)]