20248840

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1031}}^1$

素因数の和:1533

約数の個数: 32

約数和(自身を含む): 45696960

約数和(自身を除く): 25448120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1031, 1964, 2062, 2455, 3928, 4124, 4910, 5155, 8248, 9820, 10310, 19640, 20620, 41240, 506221, 1012442, 2024884, 2531105, 4049768, 5062210, 10124420, 20248840]

約数ペア:

[(1, 20248840), (2, 10124420), (4, 5062210), (5, 4049768), (8, 2531105), (10, 2024884), (20, 1012442), (40, 506221), (491, 41240), (982, 20620), (1031, 19640), (1964, 10310), (2062, 9820), (2455, 8248), (3928, 5155), (4124, 4910)]