21000921890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12426581}}^1$

素因数の和:12426614

約数の個数: 24

約数和(自身を含む): 40933161108

約数和(自身を除く): 19932239218

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12426581, 24853162, 62132905, 124265810, 161545553, 323091106, 807727765, 1615455530, 2100092189, 4200184378, 10500460945, 21000921890]

約数ペア:

[(1, 21000921890), (2, 10500460945), (5, 4200184378), (10, 2100092189), (13, 1615455530), (26, 807727765), (65, 323091106), (130, 161545553), (169, 124265810), (338, 62132905), (845, 24853162), (1690, 12426581)]