19904786

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{397}}^1$

素因数の和:506

約数の個数: 32

約数和(自身を含む): 34043328

約数和(自身を除く): 14138542

約数列:

[1, 2, 11, 22, 43, 53, 86, 106, 397, 473, 583, 794, 946, 1166, 2279, 4367, 4558, 8734, 17071, 21041, 25069, 34142, 42082, 50138, 187781, 231451, 375562, 462902, 904763, 1809526, 9952393, 19904786]

約数ペア:

[(1, 19904786), (2, 9952393), (11, 1809526), (22, 904763), (43, 462902), (53, 375562), (86, 231451), (106, 187781), (397, 50138), (473, 42082), (583, 34142), (794, 25069), (946, 21041), (1166, 17071), (2279, 8734), (4367, 4558)]