20749616

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{197}}^1\times {\mathrm{227}}^1$

素因数の和:461

約数の個数: 40

約数和(自身を含む): 41983920

約数和(自身を除く): 21234304

約数列:

[1, 2, 4, 8, 16, 29, 58, 116, 197, 227, 232, 394, 454, 464, 788, 908, 1576, 1816, 3152, 3632, 5713, 6583, 11426, 13166, 22852, 26332, 44719, 45704, 52664, 89438, 91408, 105328, 178876, 357752, 715504, 1296851, 2593702, 5187404, 10374808, 20749616]

約数ペア:

[(1, 20749616), (2, 10374808), (4, 5187404), (8, 2593702), (16, 1296851), (29, 715504), (58, 357752), (116, 178876), (197, 105328), (227, 91408), (232, 89438), (394, 52664), (454, 45704), (464, 44719), (788, 26332), (908, 22852), (1576, 13166), (1816, 11426), (3152, 6583), (3632, 5713)]