21720030

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{724001}}^1$

素因数の和:724011

約数の個数: 16

約数和(自身を含む): 52128144

約数和(自身を除く): 30408114

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 724001, 1448002, 2172003, 3620005, 4344006, 7240010, 10860015, 21720030]

約数ペア:

[(1, 21720030), (2, 10860015), (3, 7240010), (5, 4344006), (6, 3620005), (10, 2172003), (15, 1448002), (30, 724001)]