21076666

素因数分解:

$2^1\times {\mathrm{13}}^2\times {\mathrm{127}}^1\times {\mathrm{491}}^1$

素因数の和:646

約数の個数: 24

約数和(自身を含む): 34573824

約数和(自身を除く): 13497158

約数列:

[1, 2, 13, 26, 127, 169, 254, 338, 491, 982, 1651, 3302, 6383, 12766, 21463, 42926, 62357, 82979, 124714, 165958, 810641, 1621282, 10538333, 21076666]

約数ペア:

[(1, 21076666), (2, 10538333), (13, 1621282), (26, 810641), (127, 165958), (169, 124714), (254, 82979), (338, 62357), (491, 42926), (982, 21463), (1651, 12766), (3302, 6383)]