28725225

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{281}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 50353920

約数和(自身を除く): 21628695

約数列:

[1, 3, 5, 15, 25, 29, 47, 75, 87, 141, 145, 235, 281, 435, 705, 725, 843, 1175, 1363, 1405, 2175, 3525, 4089, 4215, 6815, 7025, 8149, 13207, 20445, 21075, 24447, 34075, 39621, 40745, 66035, 102225, 122235, 198105, 203725, 330175, 383003, 611175, 990525, 1149009, 1915015, 5745045, 9575075, 28725225]

約数ペア:

[(1, 28725225), (3, 9575075), (5, 5745045), (15, 1915015), (25, 1149009), (29, 990525), (47, 611175), (75, 383003), (87, 330175), (141, 203725), (145, 198105), (235, 122235), (281, 102225), (435, 66035), (705, 40745), (725, 39621), (843, 34075), (1175, 24447), (1363, 21075), (1405, 20445), (2175, 13207), (3525, 8149), (4089, 7025), (4215, 6815)]