20493910

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1$

素因数の和:408

約数の個数: 32

約数和(自身を含む): 37806912

約数和(自身を除く): 17313002

約数列:

[1, 2, 5, 10, 101, 103, 197, 202, 206, 394, 505, 515, 985, 1010, 1030, 1970, 10403, 19897, 20291, 20806, 39794, 40582, 52015, 99485, 101455, 104030, 198970, 202910, 2049391, 4098782, 10246955, 20493910]

約数ペア:

[(1, 20493910), (2, 10246955), (5, 4098782), (10, 2049391), (101, 202910), (103, 198970), (197, 104030), (202, 101455), (206, 99485), (394, 52015), (505, 40582), (515, 39794), (985, 20806), (1010, 20291), (1030, 19897), (1970, 10403)]