21051784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2851}}^1$

素因数の和:2941

約数の個数: 32

約数和(自身を含む): 43122240

約数和(自身を除く): 22070456

約数列:

[1, 2, 4, 8, 13, 26, 52, 71, 104, 142, 284, 568, 923, 1846, 2851, 3692, 5702, 7384, 11404, 22808, 37063, 74126, 148252, 202421, 296504, 404842, 809684, 1619368, 2631473, 5262946, 10525892, 21051784]

約数ペア:

[(1, 21051784), (2, 10525892), (4, 5262946), (8, 2631473), (13, 1619368), (26, 809684), (52, 404842), (71, 296504), (104, 202421), (142, 148252), (284, 74126), (568, 37063), (923, 22808), (1846, 11404), (2851, 7384), (3692, 5702)]