648050

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{997}}^1$

素因数の和:1022

約数の個数: 24

約数和(自身を含む): 1299396

約数和(自身を除く): 651346

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 325, 650, 997, 1994, 4985, 9970, 12961, 24925, 25922, 49850, 64805, 129610, 324025, 648050]

約数ペア:

[(1, 648050), (2, 324025), (5, 129610), (10, 64805), (13, 49850), (25, 25922), (26, 24925), (50, 12961), (65, 9970), (130, 4985), (325, 1994), (650, 997)]