20508075

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{449}}^1$

素因数の和:501

約数の個数: 72

約数和(自身を含む): 43524000

約数和(自身を除く): 23015925

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 29, 35, 45, 63, 75, 87, 105, 145, 175, 203, 225, 261, 315, 435, 449, 525, 609, 725, 1015, 1305, 1347, 1575, 1827, 2175, 2245, 3045, 3143, 4041, 5075, 6525, 6735, 9135, 9429, 11225, 13021, 15225, 15715, 20205, 28287, 33675, 39063, 45675, 47145, 65105, 78575, 91147, 101025, 117189, 141435, 195315, 235725, 273441, 325525, 455735, 585945, 707175, 820323, 976575, 1367205, 2278675, 2929725, 4101615, 6836025, 20508075]

約数ペア:

[(1, 20508075), (3, 6836025), (5, 4101615), (7, 2929725), (9, 2278675), (15, 1367205), (21, 976575), (25, 820323), (29, 707175), (35, 585945), (45, 455735), (63, 325525), (75, 273441), (87, 235725), (105, 195315), (145, 141435), (175, 117189), (203, 101025), (225, 91147), (261, 78575), (315, 65105), (435, 47145), (449, 45675), (525, 39063), (609, 33675), (725, 28287), (1015, 20205), (1305, 15715), (1347, 15225), (1575, 13021), (1827, 11225), (2175, 9429), (2245, 9135), (3045, 6735), (3143, 6525), (4041, 5075)]