21139155

素因数分解:

$3^2\times 5^1\times {\mathrm{461}}^1\times {\mathrm{1019}}^1$

素因数の和:1491

約数の個数: 24

約数和(自身を含む): 36756720

約数和(自身を除く): 15617565

約数列:

[1, 3, 5, 9, 15, 45, 461, 1019, 1383, 2305, 3057, 4149, 5095, 6915, 9171, 15285, 20745, 45855, 469759, 1409277, 2348795, 4227831, 7046385, 21139155]

約数ペア:

[(1, 21139155), (3, 7046385), (5, 4227831), (9, 2348795), (15, 1409277), (45, 469759), (461, 45855), (1019, 20745), (1383, 15285), (2305, 9171), (3057, 6915), (4149, 5095)]