20899545

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1999}}^1$

素因数の和:2065

約数の個数: 32

約数和(自身を含む): 36288000

約数和(自身を除く): 15388455

約数列:

[1, 3, 5, 15, 17, 41, 51, 85, 123, 205, 255, 615, 697, 1999, 2091, 3485, 5997, 9995, 10455, 29985, 33983, 81959, 101949, 169915, 245877, 409795, 509745, 1229385, 1393303, 4179909, 6966515, 20899545]

約数ペア:

[(1, 20899545), (3, 6966515), (5, 4179909), (15, 1393303), (17, 1229385), (41, 509745), (51, 409795), (85, 245877), (123, 169915), (205, 101949), (255, 81959), (615, 33983), (697, 29985), (1999, 10455), (2091, 9995), (3485, 5997)]