78120920

素因数分解:

$2^3\times 5^1\times {\mathrm{977}}^1\times {\mathrm{1999}}^1$

素因数の和:2987

約数の個数: 32

約数和(自身を含む): 176040000

約数和(自身を除く): 97919080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 977, 1954, 1999, 3908, 3998, 4885, 7816, 7996, 9770, 9995, 15992, 19540, 19990, 39080, 39980, 79960, 1953023, 3906046, 7812092, 9765115, 15624184, 19530230, 39060460, 78120920]

約数ペア:

[(1, 78120920), (2, 39060460), (4, 19530230), (5, 15624184), (8, 9765115), (10, 7812092), (20, 3906046), (40, 1953023), (977, 79960), (1954, 39980), (1999, 39080), (3908, 19990), (3998, 19540), (4885, 15992), (7816, 9995), (7996, 9770)]