81601960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1$

素因数の和:311

約数の個数: 128

約数和(自身を含む): 216691200

約数和(自身を除く): 135089240

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 43, 44, 55, 76, 86, 88, 95, 110, 152, 172, 190, 209, 215, 220, 227, 344, 380, 418, 430, 440, 454, 473, 760, 817, 836, 860, 908, 946, 1045, 1135, 1634, 1672, 1720, 1816, 1892, 2090, 2270, 2365, 2497, 3268, 3784, 4085, 4180, 4313, 4540, 4730, 4994, 6536, 8170, 8360, 8626, 8987, 9080, 9460, 9761, 9988, 12485, 16340, 17252, 17974, 18920, 19522, 19976, 21565, 24970, 32680, 34504, 35948, 39044, 43130, 44935, 47443, 48805, 49940, 71896, 78088, 86260, 89870, 94886, 97610, 99880, 107371, 172520, 179740, 185459, 189772, 195220, 214742, 237215, 359480, 370918, 379544, 390440, 429484, 474430, 536855, 741836, 858968, 927295, 948860, 1073710, 1483672, 1854590, 1897720, 2040049, 2147420, 3709180, 4080098, 4294840, 7418360, 8160196, 10200245, 16320392, 20400490, 40800980, 81601960]

約数ペア:

[(1, 81601960), (2, 40800980), (4, 20400490), (5, 16320392), (8, 10200245), (10, 8160196), (11, 7418360), (19, 4294840), (20, 4080098), (22, 3709180), (38, 2147420), (40, 2040049), (43, 1897720), (44, 1854590), (55, 1483672), (76, 1073710), (86, 948860), (88, 927295), (95, 858968), (110, 741836), (152, 536855), (172, 474430), (190, 429484), (209, 390440), (215, 379544), (220, 370918), (227, 359480), (344, 237215), (380, 214742), (418, 195220), (430, 189772), (440, 185459), (454, 179740), (473, 172520), (760, 107371), (817, 99880), (836, 97610), (860, 94886), (908, 89870), (946, 86260), (1045, 78088), (1135, 71896), (1634, 49940), (1672, 48805), (1720, 47443), (1816, 44935), (1892, 43130), (2090, 39044), (2270, 35948), (2365, 34504), (2497, 32680), (3268, 24970), (3784, 21565), (4085, 19976), (4180, 19522), (4313, 18920), (4540, 17974), (4730, 17252), (4994, 16340), (6536, 12485), (8170, 9988), (8360, 9761), (8626, 9460), (8987, 9080)]