21890392

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{66739}}^1$

素因数の和:66786

約数の個数: 16

約数和(自身を含む): 42046200

約数和(自身を除く): 20155808

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 66739, 133478, 266956, 533912, 2736299, 5472598, 10945196, 21890392]

約数ペア:

[(1, 21890392), (2, 10945196), (4, 5472598), (8, 2736299), (41, 533912), (82, 266956), (164, 133478), (328, 66739)]