20409025

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8971}}^1$

素因数の和:9001

約数の個数: 24

約数和(自身を含む): 31150784

約数和(自身を除く): 10741759

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275, 8971, 44855, 62797, 116623, 224275, 313985, 583115, 816361, 1569925, 2915575, 4081805, 20409025]

約数ペア:

[(1, 20409025), (5, 4081805), (7, 2915575), (13, 1569925), (25, 816361), (35, 583115), (65, 313985), (91, 224275), (175, 116623), (325, 62797), (455, 44855), (2275, 8971)]