640790680

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1\times {\mathrm{1321}}^1$

素因数の和:1580

約数の個数: 64

約数和(自身を含む): 1472496480

約数和(自身を除く): 831705800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 181, 268, 335, 362, 536, 670, 724, 905, 1321, 1340, 1448, 1810, 2642, 2680, 3620, 5284, 6605, 7240, 10568, 12127, 13210, 24254, 26420, 48508, 52840, 60635, 88507, 97016, 121270, 177014, 239101, 242540, 354028, 442535, 478202, 485080, 708056, 885070, 956404, 1195505, 1770140, 1912808, 2391010, 3540280, 4782020, 9564040, 16019767, 32039534, 64079068, 80098835, 128158136, 160197670, 320395340, 640790680]

約数ペア:

[(1, 640790680), (2, 320395340), (4, 160197670), (5, 128158136), (8, 80098835), (10, 64079068), (20, 32039534), (40, 16019767), (67, 9564040), (134, 4782020), (181, 3540280), (268, 2391010), (335, 1912808), (362, 1770140), (536, 1195505), (670, 956404), (724, 885070), (905, 708056), (1321, 485080), (1340, 478202), (1448, 442535), (1810, 354028), (2642, 242540), (2680, 239101), (3620, 177014), (5284, 121270), (6605, 97016), (7240, 88507), (10568, 60635), (12127, 52840), (13210, 48508), (24254, 26420)]