20745020

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12497}}^1$

素因数の和:12589

約数の個数: 24

約数和(自身を含む): 44092944

約数和(自身を除く): 23347924

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12497, 24994, 49988, 62485, 124970, 249940, 1037251, 2074502, 4149004, 5186255, 10372510, 20745020]

約数ペア:

[(1, 20745020), (2, 10372510), (4, 5186255), (5, 4149004), (10, 2074502), (20, 1037251), (83, 249940), (166, 124970), (332, 62485), (415, 49988), (830, 24994), (1660, 12497)]