81703840

素因数分解:

$2^5\times 5^1\times {\mathrm{691}}^1\times {\mathrm{739}}^1$

素因数の和:1445

約数の個数: 48

約数和(自身を含む): 193566240

約数和(自身を除く): 111862400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 691, 739, 1382, 1478, 2764, 2956, 3455, 3695, 5528, 5912, 6910, 7390, 11056, 11824, 13820, 14780, 22112, 23648, 27640, 29560, 55280, 59120, 110560, 118240, 510649, 1021298, 2042596, 2553245, 4085192, 5106490, 8170384, 10212980, 16340768, 20425960, 40851920, 81703840]

約数ペア:

[(1, 81703840), (2, 40851920), (4, 20425960), (5, 16340768), (8, 10212980), (10, 8170384), (16, 5106490), (20, 4085192), (32, 2553245), (40, 2042596), (80, 1021298), (160, 510649), (691, 118240), (739, 110560), (1382, 59120), (1478, 55280), (2764, 29560), (2956, 27640), (3455, 23648), (3695, 22112), (5528, 14780), (5912, 13820), (6910, 11824), (7390, 11056)]