21915765

素因数分解:

$3^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1021}}^1$

素因数の和:1091

約数の個数: 40

約数和(自身を含む): 40066488

約数和(自身を除く): 18150723

約数列:

[1, 3, 5, 9, 15, 27, 45, 53, 81, 135, 159, 265, 405, 477, 795, 1021, 1431, 2385, 3063, 4293, 5105, 7155, 9189, 15315, 21465, 27567, 45945, 54113, 82701, 137835, 162339, 270565, 413505, 487017, 811695, 1461051, 2435085, 4383153, 7305255, 21915765]

約数ペア:

[(1, 21915765), (3, 7305255), (5, 4383153), (9, 2435085), (15, 1461051), (27, 811695), (45, 487017), (53, 413505), (81, 270565), (135, 162339), (159, 137835), (265, 82701), (405, 54113), (477, 45945), (795, 27567), (1021, 21465), (1431, 15315), (2385, 9189), (3063, 7155), (4293, 5105)]