19995020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14081}}^1$

素因数の和:14161

約数の個数: 24

約数和(自身を含む): 42583968

約数和(自身を除く): 22588948

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14081, 28162, 56324, 70405, 140810, 281620, 999751, 1999502, 3999004, 4998755, 9997510, 19995020]

約数ペア:

[(1, 19995020), (2, 9997510), (4, 4998755), (5, 3999004), (10, 1999502), (20, 999751), (71, 281620), (142, 140810), (284, 70405), (355, 56324), (710, 28162), (1420, 14081)]