20494540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4903}}^1$

素因数の和:4942

約数の個数: 48

約数和(自身を含む): 49432320

約数和(自身を除く): 28937780

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4903, 9806, 19612, 24515, 49030, 53933, 93157, 98060, 107866, 186314, 215732, 269665, 372628, 465785, 539330, 931570, 1024727, 1078660, 1863140, 2049454, 4098908, 5123635, 10247270, 20494540]

約数ペア:

[(1, 20494540), (2, 10247270), (4, 5123635), (5, 4098908), (10, 2049454), (11, 1863140), (19, 1078660), (20, 1024727), (22, 931570), (38, 539330), (44, 465785), (55, 372628), (76, 269665), (95, 215732), (110, 186314), (190, 107866), (209, 98060), (220, 93157), (380, 53933), (418, 49030), (836, 24515), (1045, 19612), (2090, 9806), (4180, 4903)]