21796730

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19997}}^1$

素因数の和:20113

約数の個数: 16

約数和(自身を含む): 39596040

約数和(自身を除く): 17799310

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19997, 39994, 99985, 199970, 2179673, 4359346, 10898365, 21796730]

約数ペア:

[(1, 21796730), (2, 10898365), (5, 4359346), (10, 2179673), (109, 199970), (218, 99985), (545, 39994), (1090, 19997)]