208678869

素因数分解:

$3^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{15551}}^1$

素因数の和:15638

約数の個数: 32

約数和(自身を含む): 358318080

約数和(自身を除く): 149639211

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 189, 213, 497, 639, 1491, 1917, 4473, 13419, 15551, 46653, 108857, 139959, 326571, 419877, 979713, 1104121, 2939139, 3312363, 7728847, 9937089, 23186541, 29811267, 69559623, 208678869]

約数ペア:

[(1, 208678869), (3, 69559623), (7, 29811267), (9, 23186541), (21, 9937089), (27, 7728847), (63, 3312363), (71, 2939139), (189, 1104121), (213, 979713), (497, 419877), (639, 326571), (1491, 139959), (1917, 108857), (4473, 46653), (13419, 15551)]