21391448

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2897}}^1$

素因数の和:2987

約数の個数: 32

約数和(自身を含む): 43817760

約数和(自身を除く): 22426312

約数列:

[1, 2, 4, 8, 13, 26, 52, 71, 104, 142, 284, 568, 923, 1846, 2897, 3692, 5794, 7384, 11588, 23176, 37661, 75322, 150644, 205687, 301288, 411374, 822748, 1645496, 2673931, 5347862, 10695724, 21391448]

約数ペア:

[(1, 21391448), (2, 10695724), (4, 5347862), (8, 2673931), (13, 1645496), (26, 822748), (52, 411374), (71, 301288), (104, 205687), (142, 150644), (284, 75322), (568, 37661), (923, 23176), (1846, 11588), (2897, 7384), (3692, 5794)]