21910090

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{20101}}^1$

素因数の和:20217

約数の個数: 16

約数和(自身を含む): 39801960

約数和(自身を除く): 17891870

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 20101, 40202, 100505, 201010, 2191009, 4382018, 10955045, 21910090]

約数ペア:

[(1, 21910090), (2, 10955045), (5, 4382018), (10, 2191009), (109, 201010), (218, 100505), (545, 40202), (1090, 20101)]