81963920

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24989}}^1$

素因数の和:25043

約数の個数: 40

約数和(自身を含む): 195221880

約数和(自身を除く): 113257960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 24989, 49978, 99956, 124945, 199912, 249890, 399824, 499780, 999560, 1024549, 1999120, 2049098, 4098196, 5122745, 8196392, 10245490, 16392784, 20490980, 40981960, 81963920]

約数ペア:

[(1, 81963920), (2, 40981960), (4, 20490980), (5, 16392784), (8, 10245490), (10, 8196392), (16, 5122745), (20, 4098196), (40, 2049098), (41, 1999120), (80, 1024549), (82, 999560), (164, 499780), (205, 399824), (328, 249890), (410, 199912), (656, 124945), (820, 99956), (1640, 49978), (3280, 24989)]