21406216

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 44271360

約数和(自身を除く): 22865144

約数列:

[1, 2, 4, 8, 13, 26, 52, 71, 104, 142, 169, 223, 284, 338, 446, 568, 676, 892, 923, 1352, 1784, 1846, 2899, 3692, 5798, 7384, 11596, 11999, 15833, 23192, 23998, 31666, 37687, 47996, 63332, 75374, 95992, 126664, 150748, 205829, 301496, 411658, 823316, 1646632, 2675777, 5351554, 10703108, 21406216]

約数ペア:

[(1, 21406216), (2, 10703108), (4, 5351554), (8, 2675777), (13, 1646632), (26, 823316), (52, 411658), (71, 301496), (104, 205829), (142, 150748), (169, 126664), (223, 95992), (284, 75374), (338, 63332), (446, 47996), (568, 37687), (676, 31666), (892, 23998), (923, 23192), (1352, 15833), (1784, 11999), (1846, 11596), (2899, 7384), (3692, 5798)]