18620685

素因数分解:

$3^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1999}}^1$

素因数の和:2039

約数の個数: 40

約数和(自身を含む): 34848000

約数和(自身を除く): 16227315

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 345, 405, 621, 1035, 1863, 1999, 3105, 5997, 9315, 9995, 17991, 29985, 45977, 53973, 89955, 137931, 161919, 229885, 269865, 413793, 689655, 809595, 1241379, 2068965, 3724137, 6206895, 18620685]

約数ペア:

[(1, 18620685), (3, 6206895), (5, 3724137), (9, 2068965), (15, 1241379), (23, 809595), (27, 689655), (45, 413793), (69, 269865), (81, 229885), (115, 161919), (135, 137931), (207, 89955), (345, 53973), (405, 45977), (621, 29985), (1035, 17991), (1863, 9995), (1999, 9315), (3105, 5997)]