21089908

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{18371}}^1$

素因数の和:18423

約数の個数: 24

約数和(自身を含む): 43210944

約数和(自身を除く): 22121036

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 18371, 36742, 73484, 128597, 257194, 514388, 753211, 1506422, 3012844, 5272477, 10544954, 21089908]

約数ペア:

[(1, 21089908), (2, 10544954), (4, 5272477), (7, 3012844), (14, 1506422), (28, 753211), (41, 514388), (82, 257194), (164, 128597), (287, 73484), (574, 36742), (1148, 18371)]