81570440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{317}}^1\times {\mathrm{919}}^1$

素因数の和:1254

約数の個数: 64

約数和(自身を含む): 210643200

約数和(自身を除く): 129072760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 317, 634, 919, 1268, 1585, 1838, 2219, 2536, 3170, 3676, 4438, 4595, 6340, 6433, 7352, 8876, 9190, 11095, 12680, 12866, 17752, 18380, 22190, 25732, 32165, 36760, 44380, 51464, 64330, 88760, 128660, 257320, 291323, 582646, 1165292, 1456615, 2039261, 2330584, 2913230, 4078522, 5826460, 8157044, 10196305, 11652920, 16314088, 20392610, 40785220, 81570440]

約数ペア:

[(1, 81570440), (2, 40785220), (4, 20392610), (5, 16314088), (7, 11652920), (8, 10196305), (10, 8157044), (14, 5826460), (20, 4078522), (28, 2913230), (35, 2330584), (40, 2039261), (56, 1456615), (70, 1165292), (140, 582646), (280, 291323), (317, 257320), (634, 128660), (919, 88760), (1268, 64330), (1585, 51464), (1838, 44380), (2219, 36760), (2536, 32165), (3170, 25732), (3676, 22190), (4438, 18380), (4595, 17752), (6340, 12866), (6433, 12680), (7352, 11095), (8876, 9190)]