20835620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{631}}^1$

素因数の和:780

約数の個数: 48

約数和(自身を含む): 47566848

約数和(自身を除く): 26731228

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 127, 130, 254, 260, 508, 631, 635, 1262, 1270, 1651, 2524, 2540, 3155, 3302, 6310, 6604, 8203, 8255, 12620, 16406, 16510, 32812, 33020, 41015, 80137, 82030, 160274, 164060, 320548, 400685, 801370, 1041781, 1602740, 2083562, 4167124, 5208905, 10417810, 20835620]

約数ペア:

[(1, 20835620), (2, 10417810), (4, 5208905), (5, 4167124), (10, 2083562), (13, 1602740), (20, 1041781), (26, 801370), (52, 400685), (65, 320548), (127, 164060), (130, 160274), (254, 82030), (260, 80137), (508, 41015), (631, 33020), (635, 32812), (1262, 16510), (1270, 16406), (1651, 12620), (2524, 8255), (2540, 8203), (3155, 6604), (3302, 6310)]