18161960

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1301}}^1$

素因数の和:1661

約数の個数: 32

約数和(自身を含む): 41013000

約数和(自身を除く): 22851040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1301, 1396, 1745, 2602, 2792, 3490, 5204, 6505, 6980, 10408, 13010, 13960, 26020, 52040, 454049, 908098, 1816196, 2270245, 3632392, 4540490, 9080980, 18161960]

約数ペア:

[(1, 18161960), (2, 9080980), (4, 4540490), (5, 3632392), (8, 2270245), (10, 1816196), (20, 908098), (40, 454049), (349, 52040), (698, 26020), (1301, 13960), (1396, 13010), (1745, 10408), (2602, 6980), (2792, 6505), (3490, 5204)]