420199160

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{256219}}^1$

素因数の和:256271

約数の個数: 32

約数和(自身を含む): 968511600

約数和(自身を除く): 548312440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 256219, 512438, 1024876, 1281095, 2049752, 2562190, 5124380, 10248760, 10504979, 21009958, 42019916, 52524895, 84039832, 105049790, 210099580, 420199160]

約数ペア:

[(1, 420199160), (2, 210099580), (4, 105049790), (5, 84039832), (8, 52524895), (10, 42019916), (20, 21009958), (40, 10504979), (41, 10248760), (82, 5124380), (164, 2562190), (205, 2049752), (328, 1281095), (410, 1024876), (820, 512438), (1640, 256219)]