21528075

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{7001}}^1$

素因数の和:7055

約数の個数: 24

約数和(自身を含む): 36466416

約数和(自身を除く): 14938341

約数列:

[1, 3, 5, 15, 25, 41, 75, 123, 205, 615, 1025, 3075, 7001, 21003, 35005, 105015, 175025, 287041, 525075, 861123, 1435205, 4305615, 7176025, 21528075]

約数ペア:

[(1, 21528075), (3, 7176025), (5, 4305615), (15, 1435205), (25, 861123), (41, 525075), (75, 287041), (123, 175025), (205, 105015), (615, 35005), (1025, 21003), (3075, 7001)]