20872485

素因数分解:

$3^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{419}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 38525760

約数和(自身を除く): 17653275

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 135, 205, 243, 369, 405, 419, 615, 1107, 1215, 1257, 1845, 2095, 3321, 3771, 5535, 6285, 9963, 11313, 16605, 17179, 18855, 33939, 49815, 51537, 56565, 85895, 101817, 154611, 169695, 257685, 463833, 509085, 773055, 1391499, 2319165, 4174497, 6957495, 20872485]

約数ペア:

[(1, 20872485), (3, 6957495), (5, 4174497), (9, 2319165), (15, 1391499), (27, 773055), (41, 509085), (45, 463833), (81, 257685), (123, 169695), (135, 154611), (205, 101817), (243, 85895), (369, 56565), (405, 51537), (419, 49815), (615, 33939), (1107, 18855), (1215, 17179), (1257, 16605), (1845, 11313), (2095, 9963), (3321, 6285), (3771, 5535)]