20807240

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{911}}^1$

素因数の和:1493

約数の個数: 32

約数和(自身を含む): 46949760

約数和(自身を除く): 26142520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 911, 1142, 1822, 2284, 2855, 3644, 4555, 4568, 5710, 7288, 9110, 11420, 18220, 22840, 36440, 520181, 1040362, 2080724, 2600905, 4161448, 5201810, 10403620, 20807240]

約数ペア:

[(1, 20807240), (2, 10403620), (4, 5201810), (5, 4161448), (8, 2600905), (10, 2080724), (20, 1040362), (40, 520181), (571, 36440), (911, 22840), (1142, 18220), (1822, 11420), (2284, 9110), (2855, 7288), (3644, 5710), (4555, 4568)]