20686420

素因数分解:

$2^2\times 5^1\times {\mathrm{601}}^1\times {\mathrm{1721}}^1$

素因数の和:2331

約数の個数: 24

約数和(自身を含む): 43539048

約数和(自身を除く): 22852628

約数列:

[1, 2, 4, 5, 10, 20, 601, 1202, 1721, 2404, 3005, 3442, 6010, 6884, 8605, 12020, 17210, 34420, 1034321, 2068642, 4137284, 5171605, 10343210, 20686420]

約数ペア:

[(1, 20686420), (2, 10343210), (4, 5171605), (5, 4137284), (10, 2068642), (20, 1034321), (601, 34420), (1202, 17210), (1721, 12020), (2404, 8605), (3005, 6884), (3442, 6010)]