138857960

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{56909}}^1$

素因数の和:56981

約数の個数: 32

約数和(自身を含む): 317557800

約数和(自身を除く): 178699840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 56909, 113818, 227636, 284545, 455272, 569090, 1138180, 2276360, 3471449, 6942898, 13885796, 17357245, 27771592, 34714490, 69428980, 138857960]

約数ペア:

[(1, 138857960), (2, 69428980), (4, 34714490), (5, 27771592), (8, 17357245), (10, 13885796), (20, 6942898), (40, 3471449), (61, 2276360), (122, 1138180), (244, 569090), (305, 455272), (488, 284545), (610, 227636), (1220, 113818), (2440, 56909)]