81078560

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4649}}^1$

素因数の和:4773

約数の個数: 48

約数和(自身を含む): 193347000

約数和(自身を除く): 112268440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1744, 2180, 3488, 4360, 4649, 8720, 9298, 17440, 18596, 23245, 37192, 46490, 74384, 92980, 148768, 185960, 371920, 506741, 743840, 1013482, 2026964, 2533705, 4053928, 5067410, 8107856, 10134820, 16215712, 20269640, 40539280, 81078560]

約数ペア:

[(1, 81078560), (2, 40539280), (4, 20269640), (5, 16215712), (8, 10134820), (10, 8107856), (16, 5067410), (20, 4053928), (32, 2533705), (40, 2026964), (80, 1013482), (109, 743840), (160, 506741), (218, 371920), (436, 185960), (545, 148768), (872, 92980), (1090, 74384), (1744, 46490), (2180, 37192), (3488, 23245), (4360, 18596), (4649, 17440), (8720, 9298)]