81638252

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 153990144

約数和(自身を除く): 72351892

約数列:

[1, 2, 4, 31, 43, 61, 62, 86, 122, 124, 172, 244, 251, 502, 1004, 1333, 1891, 2623, 2666, 3782, 5246, 5332, 7564, 7781, 10492, 10793, 15311, 15562, 21586, 30622, 31124, 43172, 61244, 81313, 162626, 325252, 334583, 474641, 658373, 669166, 949282, 1316746, 1338332, 1898564, 2633492, 20409563, 40819126, 81638252]

約数ペア:

[(1, 81638252), (2, 40819126), (4, 20409563), (31, 2633492), (43, 1898564), (61, 1338332), (62, 1316746), (86, 949282), (122, 669166), (124, 658373), (172, 474641), (244, 334583), (251, 325252), (502, 162626), (1004, 81313), (1333, 61244), (1891, 43172), (2623, 31124), (2666, 30622), (3782, 21586), (5246, 15562), (5332, 15311), (7564, 10793), (7781, 10492)]