20624680

素因数分解:

$2^3\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1013}}^1$

素因数の和:1533

約数の個数: 32

約数和(自身を含む): 46542600

約数和(自身を除く): 25917920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 509, 1013, 1018, 2026, 2036, 2545, 4052, 4072, 5065, 5090, 8104, 10130, 10180, 20260, 20360, 40520, 515617, 1031234, 2062468, 2578085, 4124936, 5156170, 10312340, 20624680]

約数ペア:

[(1, 20624680), (2, 10312340), (4, 5156170), (5, 4124936), (8, 2578085), (10, 2062468), (20, 1031234), (40, 515617), (509, 40520), (1013, 20360), (1018, 20260), (2026, 10180), (2036, 10130), (2545, 8104), (4052, 5090), (4072, 5065)]