20431780

素因数分解:

$2^2\times 5^1\times {\mathrm{631}}^1\times {\mathrm{1619}}^1$

素因数の和:2259

約数の個数: 24

約数和(自身を含む): 43001280

約数和(自身を除く): 22569500

約数列:

[1, 2, 4, 5, 10, 20, 631, 1262, 1619, 2524, 3155, 3238, 6310, 6476, 8095, 12620, 16190, 32380, 1021589, 2043178, 4086356, 5107945, 10215890, 20431780]

約数ペア:

[(1, 20431780), (2, 10215890), (4, 5107945), (5, 4086356), (10, 2043178), (20, 1021589), (631, 32380), (1262, 16190), (1619, 12620), (2524, 8095), (3155, 6476), (3238, 6310)]