21239025

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{6907}}^1$

素因数の和:6961

約数の個数: 24

約数和(自身を含む): 35976864

約数和(自身を除く): 14737839

約数列:

[1, 3, 5, 15, 25, 41, 75, 123, 205, 615, 1025, 3075, 6907, 20721, 34535, 103605, 172675, 283187, 518025, 849561, 1415935, 4247805, 7079675, 21239025]

約数ペア:

[(1, 21239025), (3, 7079675), (5, 4247805), (15, 1415935), (25, 849561), (41, 518025), (75, 283187), (123, 172675), (205, 103605), (615, 34535), (1025, 20721), (3075, 6907)]