640770880

素因数分解:

$2^6\times 5^1\times {\mathrm{127}}^1\times {\mathrm{15767}}^1$

素因数の和:15911

約数の個数: 56

約数和(自身を含む): 1537947648

約数和(自身を除く): 897176768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 160, 254, 320, 508, 635, 1016, 1270, 2032, 2540, 4064, 5080, 8128, 10160, 15767, 20320, 31534, 40640, 63068, 78835, 126136, 157670, 252272, 315340, 504544, 630680, 1009088, 1261360, 2002409, 2522720, 4004818, 5045440, 8009636, 10012045, 16019272, 20024090, 32038544, 40048180, 64077088, 80096360, 128154176, 160192720, 320385440, 640770880]

約数ペア:

[(1, 640770880), (2, 320385440), (4, 160192720), (5, 128154176), (8, 80096360), (10, 64077088), (16, 40048180), (20, 32038544), (32, 20024090), (40, 16019272), (64, 10012045), (80, 8009636), (127, 5045440), (160, 4004818), (254, 2522720), (320, 2002409), (508, 1261360), (635, 1009088), (1016, 630680), (1270, 504544), (2032, 315340), (2540, 252272), (4064, 157670), (5080, 126136), (8128, 78835), (10160, 63068), (15767, 40640), (20320, 31534)]