20878635

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1997}}^1$

素因数の和:2063

約数の個数: 32

約数和(自身を含む): 36251712

約数和(自身を除く): 15373077

約数列:

[1, 3, 5, 15, 17, 41, 51, 85, 123, 205, 255, 615, 697, 1997, 2091, 3485, 5991, 9985, 10455, 29955, 33949, 81877, 101847, 169745, 245631, 409385, 509235, 1228155, 1391909, 4175727, 6959545, 20878635]

約数ペア:

[(1, 20878635), (3, 6959545), (5, 4175727), (15, 1391909), (17, 1228155), (41, 509235), (51, 409385), (85, 245631), (123, 169745), (205, 101847), (255, 81877), (615, 33949), (697, 29955), (1997, 10455), (2091, 9985), (3485, 5991)]