21315285

素因数分解:

$3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3851}}^1$

素因数の和:3906

約数の個数: 32

約数和(自身を含む): 38828160

約数和(自身を除く): 17512875

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 123, 135, 205, 369, 615, 1107, 1845, 3851, 5535, 11553, 19255, 34659, 57765, 103977, 157891, 173295, 473673, 519885, 789455, 1421019, 2368365, 4263057, 7105095, 21315285]

約数ペア:

[(1, 21315285), (3, 7105095), (5, 4263057), (9, 2368365), (15, 1421019), (27, 789455), (41, 519885), (45, 473673), (123, 173295), (135, 157891), (205, 103977), (369, 57765), (615, 34659), (1107, 19255), (1845, 11553), (3851, 5535)]