20981368

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{971}}^1$

素因数の和:1087

約数の個数: 32

約数和(自身を含む): 40998960

約数和(自身を除く): 20017592

約数列:

[1, 2, 4, 8, 37, 73, 74, 146, 148, 292, 296, 584, 971, 1942, 2701, 3884, 5402, 7768, 10804, 21608, 35927, 70883, 71854, 141766, 143708, 283532, 287416, 567064, 2622671, 5245342, 10490684, 20981368]

約数ペア:

[(1, 20981368), (2, 10490684), (4, 5245342), (8, 2622671), (37, 567064), (73, 287416), (74, 283532), (146, 143708), (148, 141766), (292, 71854), (296, 70883), (584, 35927), (971, 21608), (1942, 10804), (2701, 7768), (3884, 5402)]