81890480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{569}}^1$

素因数の和:846

約数の個数: 80

約数和(自身を含む): 218825280

約数和(自身を除く): 136934800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 257, 280, 514, 560, 569, 1028, 1138, 1285, 1799, 2056, 2276, 2570, 2845, 3598, 3983, 4112, 4552, 5140, 5690, 7196, 7966, 8995, 9104, 10280, 11380, 14392, 15932, 17990, 19915, 20560, 22760, 28784, 31864, 35980, 39830, 45520, 63728, 71960, 79660, 143920, 146233, 159320, 292466, 318640, 584932, 731165, 1023631, 1169864, 1462330, 2047262, 2339728, 2924660, 4094524, 5118155, 5849320, 8189048, 10236310, 11698640, 16378096, 20472620, 40945240, 81890480]

約数ペア:

[(1, 81890480), (2, 40945240), (4, 20472620), (5, 16378096), (7, 11698640), (8, 10236310), (10, 8189048), (14, 5849320), (16, 5118155), (20, 4094524), (28, 2924660), (35, 2339728), (40, 2047262), (56, 1462330), (70, 1169864), (80, 1023631), (112, 731165), (140, 584932), (257, 318640), (280, 292466), (514, 159320), (560, 146233), (569, 143920), (1028, 79660), (1138, 71960), (1285, 63728), (1799, 45520), (2056, 39830), (2276, 35980), (2570, 31864), (2845, 28784), (3598, 22760), (3983, 20560), (4112, 19915), (4552, 17990), (5140, 15932), (5690, 14392), (7196, 11380), (7966, 10280), (8995, 9104)]