20409220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78497}}^1$

素因数の和:78519

約数の個数: 24

約数和(自身を含む): 46156824

約数和(自身を除く): 25747604

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78497, 156994, 313988, 392485, 784970, 1020461, 1569940, 2040922, 4081844, 5102305, 10204610, 20409220]

約数ペア:

[(1, 20409220), (2, 10204610), (4, 5102305), (5, 4081844), (10, 2040922), (13, 1569940), (20, 1020461), (26, 784970), (52, 392485), (65, 313988), (130, 156994), (260, 78497)]