280401020

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1\times {\mathrm{1723}}^1$

素因数の和:1914

約数の個数: 48

約数和(自身を含む): 602434560

約数和(自身を除く): 322033540

約数列:

[1, 2, 4, 5, 10, 20, 79, 103, 158, 206, 316, 395, 412, 515, 790, 1030, 1580, 1723, 2060, 3446, 6892, 8137, 8615, 16274, 17230, 32548, 34460, 40685, 81370, 136117, 162740, 177469, 272234, 354938, 544468, 680585, 709876, 887345, 1361170, 1774690, 2722340, 3549380, 14020051, 28040102, 56080204, 70100255, 140200510, 280401020]

約数ペア:

[(1, 280401020), (2, 140200510), (4, 70100255), (5, 56080204), (10, 28040102), (20, 14020051), (79, 3549380), (103, 2722340), (158, 1774690), (206, 1361170), (316, 887345), (395, 709876), (412, 680585), (515, 544468), (790, 354938), (1030, 272234), (1580, 177469), (1723, 162740), (2060, 136117), (3446, 81370), (6892, 40685), (8137, 34460), (8615, 32548), (16274, 17230)]