20926568

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{647}}^1$

素因数の和:977

約数の個数: 32

約数和(自身を含む): 42456960

約数和(自身を除く): 21530392

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 311, 622, 647, 1244, 1294, 2488, 2588, 4043, 5176, 8086, 8411, 16172, 16822, 32344, 33644, 67288, 201217, 402434, 804868, 1609736, 2615821, 5231642, 10463284, 20926568]

約数ペア:

[(1, 20926568), (2, 10463284), (4, 5231642), (8, 2615821), (13, 1609736), (26, 804868), (52, 402434), (104, 201217), (311, 67288), (622, 33644), (647, 32344), (1244, 16822), (1294, 16172), (2488, 8411), (2588, 8086), (4043, 5176)]