19998488

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{3209}}^1$

素因数の和:3275

約数の個数: 32

約数和(自身を含む): 40446000

約数和(自身を除く): 20447512

約数列:

[1, 2, 4, 8, 19, 38, 41, 76, 82, 152, 164, 328, 779, 1558, 3116, 3209, 6232, 6418, 12836, 25672, 60971, 121942, 131569, 243884, 263138, 487768, 526276, 1052552, 2499811, 4999622, 9999244, 19998488]

約数ペア:

[(1, 19998488), (2, 9999244), (4, 4999622), (8, 2499811), (19, 1052552), (38, 526276), (41, 487768), (76, 263138), (82, 243884), (152, 131569), (164, 121942), (328, 60971), (779, 25672), (1558, 12836), (3116, 6418), (3209, 6232)]