21569895

素因数分解:

$3^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{433}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 39809952

約数和(自身を除く): 18240057

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 135, 205, 243, 369, 405, 433, 615, 1107, 1215, 1299, 1845, 2165, 3321, 3897, 5535, 6495, 9963, 11691, 16605, 17753, 19485, 35073, 49815, 53259, 58455, 88765, 105219, 159777, 175365, 266295, 479331, 526095, 798885, 1437993, 2396655, 4313979, 7189965, 21569895]

約数ペア:

[(1, 21569895), (3, 7189965), (5, 4313979), (9, 2396655), (15, 1437993), (27, 798885), (41, 526095), (45, 479331), (81, 266295), (123, 175365), (135, 159777), (205, 105219), (243, 88765), (369, 58455), (405, 53259), (433, 49815), (615, 35073), (1107, 19485), (1215, 17753), (1299, 16605), (1845, 11691), (2165, 9963), (3321, 6495), (3897, 5535)]