20561138

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{347}}^1$

素因数の和:458

約数の個数: 32

約数和(自身を含む): 34727616

約数和(自身を除く): 14166478

約数列:

[1, 2, 13, 26, 43, 53, 86, 106, 347, 559, 689, 694, 1118, 1378, 2279, 4511, 4558, 9022, 14921, 18391, 29627, 29842, 36782, 59254, 193973, 239083, 387946, 478166, 790813, 1581626, 10280569, 20561138]

約数ペア:

[(1, 20561138), (2, 10280569), (13, 1581626), (26, 790813), (43, 478166), (53, 387946), (86, 239083), (106, 193973), (347, 59254), (559, 36782), (689, 29842), (694, 29627), (1118, 18391), (1378, 14921), (2279, 9022), (4511, 4558)]