21399220

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{14657}}^1$

素因数の和:14739

約数の個数: 24

約数和(自身を含む): 45557064

約数和(自身を除く): 24157844

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 14657, 29314, 58628, 73285, 146570, 293140, 1069961, 2139922, 4279844, 5349805, 10699610, 21399220]

約数ペア:

[(1, 21399220), (2, 10699610), (4, 5349805), (5, 4279844), (10, 2139922), (20, 1069961), (73, 293140), (146, 146570), (292, 73285), (365, 58628), (730, 29314), (1460, 14657)]