20503725

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{857}}^1$

素因数の和:910

約数の個数: 48

約数和(自身を含む): 38301120

約数和(自身を除く): 17797395

約数列:

[1, 3, 5, 11, 15, 25, 29, 33, 55, 75, 87, 145, 165, 275, 319, 435, 725, 825, 857, 957, 1595, 2175, 2571, 4285, 4785, 7975, 9427, 12855, 21425, 23925, 24853, 28281, 47135, 64275, 74559, 124265, 141405, 235675, 273383, 372795, 621325, 707025, 820149, 1366915, 1863975, 4100745, 6834575, 20503725]

約数ペア:

[(1, 20503725), (3, 6834575), (5, 4100745), (11, 1863975), (15, 1366915), (25, 820149), (29, 707025), (33, 621325), (55, 372795), (75, 273383), (87, 235675), (145, 141405), (165, 124265), (275, 74559), (319, 64275), (435, 47135), (725, 28281), (825, 24853), (857, 23925), (957, 21425), (1595, 12855), (2175, 9427), (2571, 7975), (4285, 4785)]