28215820

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{13697}}^1$

素因数の和:13809

約数の個数: 24

約数和(自身を含む): 59832864

約数和(自身を除く): 31617044

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 13697, 27394, 54788, 68485, 136970, 273940, 1410791, 2821582, 5643164, 7053955, 14107910, 28215820]

約数ペア:

[(1, 28215820), (2, 14107910), (4, 7053955), (5, 5643164), (10, 2821582), (20, 1410791), (103, 273940), (206, 136970), (412, 68485), (515, 54788), (1030, 27394), (2060, 13697)]