638860136

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{1993}}^1\times {\mathrm{2357}}^1$

素因数の和:4373

約数の個数: 32

約数和(自身を含む): 1269500040

約数和(自身を除く): 630639904

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 1993, 2357, 3986, 4714, 7972, 9428, 15944, 18856, 33881, 40069, 67762, 80138, 135524, 160276, 271048, 320552, 4697501, 9395002, 18790004, 37580008, 79857517, 159715034, 319430068, 638860136]

約数ペア:

[(1, 638860136), (2, 319430068), (4, 159715034), (8, 79857517), (17, 37580008), (34, 18790004), (68, 9395002), (136, 4697501), (1993, 320552), (2357, 271048), (3986, 160276), (4714, 135524), (7972, 80138), (9428, 67762), (15944, 40069), (18856, 33881)]