20090125

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{769}}^1$

素因数の和:814

約数の個数: 32

約数和(自身を含む): 28828800

約数和(自身を除く): 8738675

約数列:

[1, 5, 11, 19, 25, 55, 95, 125, 209, 275, 475, 769, 1045, 1375, 2375, 3845, 5225, 8459, 14611, 19225, 26125, 42295, 73055, 96125, 160721, 211475, 365275, 803605, 1057375, 1826375, 4018025, 20090125]

約数ペア:

[(1, 20090125), (5, 4018025), (11, 1826375), (19, 1057375), (25, 803605), (55, 365275), (95, 211475), (125, 160721), (209, 96125), (275, 73055), (475, 42295), (769, 26125), (1045, 19225), (1375, 14611), (2375, 8459), (3845, 5225)]