21405075

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{6961}}^1$

素因数の和:7015

約数の個数: 24

約数和(自身を含む): 36258096

約数和(自身を除く): 14853021

約数列:

[1, 3, 5, 15, 25, 41, 75, 123, 205, 615, 1025, 3075, 6961, 20883, 34805, 104415, 174025, 285401, 522075, 856203, 1427005, 4281015, 7135025, 21405075]

約数ペア:

[(1, 21405075), (3, 7135025), (5, 4281015), (15, 1427005), (25, 856203), (41, 522075), (75, 285401), (123, 174025), (205, 104415), (615, 34805), (1025, 20883), (3075, 6961)]