21470265

素因数分解:

$3^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{431}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 18156231

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 135, 205, 243, 369, 405, 431, 615, 1107, 1215, 1293, 1845, 2155, 3321, 3879, 5535, 6465, 9963, 11637, 16605, 17671, 19395, 34911, 49815, 53013, 58185, 88355, 104733, 159039, 174555, 265065, 477117, 523665, 795195, 1431351, 2385585, 4294053, 7156755, 21470265]

約数ペア:

[(1, 21470265), (3, 7156755), (5, 4294053), (9, 2385585), (15, 1431351), (27, 795195), (41, 523665), (45, 477117), (81, 265065), (123, 174555), (135, 159039), (205, 104733), (243, 88355), (369, 58185), (405, 53013), (431, 49815), (615, 34911), (1107, 19395), (1215, 17671), (1293, 16605), (1845, 11637), (2155, 9963), (3321, 6465), (3879, 5535)]