20935215

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1621}}^1$

素因数の和:1680

約数の個数: 48

約数和(自身を含む): 42509376

約数和(自身を除く): 21574161

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 63, 105, 123, 205, 287, 315, 369, 615, 861, 1435, 1621, 1845, 2583, 4305, 4863, 8105, 11347, 12915, 14589, 24315, 34041, 56735, 66461, 72945, 102123, 170205, 199383, 332305, 465227, 510615, 598149, 996915, 1395681, 2326135, 2990745, 4187043, 6978405, 20935215]

約数ペア:

[(1, 20935215), (3, 6978405), (5, 4187043), (7, 2990745), (9, 2326135), (15, 1395681), (21, 996915), (35, 598149), (41, 510615), (45, 465227), (63, 332305), (105, 199383), (123, 170205), (205, 102123), (287, 72945), (315, 66461), (369, 56735), (615, 34041), (861, 24315), (1435, 14589), (1621, 12915), (1845, 11347), (2583, 8105), (4305, 4863)]