21287960

素因数分解:

$2^3\times 5^1\times {\mathrm{532199}}^1$

素因数の和:532210

約数の個数: 16

約数和(自身を含む): 47898000

約数和(自身を除く): 26610040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 532199, 1064398, 2128796, 2660995, 4257592, 5321990, 10643980, 21287960]

約数ペア:

[(1, 21287960), (2, 10643980), (4, 5321990), (5, 4257592), (8, 2660995), (10, 2128796), (20, 1064398), (40, 532199)]