81011440

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:494

約数の個数: 80

約数和(自身を含む): 199987200

約数和(自身を除く): 118975760

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 223, 239, 304, 380, 446, 478, 760, 892, 956, 1115, 1195, 1520, 1784, 1912, 2230, 2390, 3568, 3824, 4237, 4460, 4541, 4780, 8474, 8920, 9082, 9560, 16948, 17840, 18164, 19120, 21185, 22705, 33896, 36328, 42370, 45410, 53297, 67792, 72656, 84740, 90820, 106594, 169480, 181640, 213188, 266485, 338960, 363280, 426376, 532970, 852752, 1012643, 1065940, 2025286, 2131880, 4050572, 4263760, 5063215, 8101144, 10126430, 16202288, 20252860, 40505720, 81011440]

約数ペア:

[(1, 81011440), (2, 40505720), (4, 20252860), (5, 16202288), (8, 10126430), (10, 8101144), (16, 5063215), (19, 4263760), (20, 4050572), (38, 2131880), (40, 2025286), (76, 1065940), (80, 1012643), (95, 852752), (152, 532970), (190, 426376), (223, 363280), (239, 338960), (304, 266485), (380, 213188), (446, 181640), (478, 169480), (760, 106594), (892, 90820), (956, 84740), (1115, 72656), (1195, 67792), (1520, 53297), (1784, 45410), (1912, 42370), (2230, 36328), (2390, 33896), (3568, 22705), (3824, 21185), (4237, 19120), (4460, 18164), (4541, 17840), (4780, 16948), (8474, 9560), (8920, 9082)]