21019155

素因数分解:

$3^1\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2753}}^1$

素因数の和:3270

約数の個数: 16

約数和(自身を含む): 33708960

約数和(自身を除く): 12689805

約数列:

[1, 3, 5, 15, 509, 1527, 2545, 2753, 7635, 8259, 13765, 41295, 1401277, 4203831, 7006385, 21019155]

約数ペア:

[(1, 21019155), (3, 7006385), (5, 4203831), (15, 1401277), (509, 41295), (1527, 13765), (2545, 8259), (2753, 7635)]