820128225

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{25609}}^1$

素因数の和:25690

約数の個数: 48

約数和(自身を含む): 1575117440

約数和(自身を除く): 754989215

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 61, 75, 105, 175, 183, 305, 427, 525, 915, 1281, 1525, 2135, 4575, 6405, 10675, 25609, 32025, 76827, 128045, 179263, 384135, 537789, 640225, 896315, 1562149, 1920675, 2688945, 4481575, 4686447, 7810745, 10935043, 13444725, 23432235, 32805129, 39053725, 54675215, 117161175, 164025645, 273376075, 820128225]

約数ペア:

[(1, 820128225), (3, 273376075), (5, 164025645), (7, 117161175), (15, 54675215), (21, 39053725), (25, 32805129), (35, 23432235), (61, 13444725), (75, 10935043), (105, 7810745), (175, 4686447), (183, 4481575), (305, 2688945), (427, 1920675), (525, 1562149), (915, 896315), (1281, 640225), (1525, 537789), (2135, 384135), (4575, 179263), (6405, 128045), (10675, 76827), (25609, 32025)]