21372505

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1291}}^1$

素因数の和:1357

約数の個数: 32

約数和(自身を含む): 32744448

約数和(自身を除く): 11371943

約数列:

[1, 5, 7, 11, 35, 43, 55, 77, 215, 301, 385, 473, 1291, 1505, 2365, 3311, 6455, 9037, 14201, 16555, 45185, 55513, 71005, 99407, 277565, 388591, 497035, 610643, 1942955, 3053215, 4274501, 21372505]

約数ペア:

[(1, 21372505), (5, 4274501), (7, 3053215), (11, 1942955), (35, 610643), (43, 497035), (55, 388591), (77, 277565), (215, 99407), (301, 71005), (385, 55513), (473, 45185), (1291, 16555), (1505, 14201), (2365, 9037), (3311, 6455)]