81991980

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:333

約数の個数: 192

約数和(自身を含む): 295680000

約数和(自身を除く): 213688020

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 84, 90, 105, 108, 109, 126, 135, 140, 180, 189, 199, 210, 218, 252, 270, 315, 327, 378, 398, 420, 436, 540, 545, 597, 630, 654, 756, 763, 796, 945, 981, 995, 1090, 1194, 1260, 1308, 1393, 1526, 1635, 1791, 1890, 1962, 1990, 2180, 2289, 2388, 2786, 2943, 2985, 3052, 3270, 3582, 3780, 3815, 3924, 3980, 4179, 4578, 4905, 5373, 5572, 5886, 5970, 6540, 6867, 6965, 7164, 7630, 8358, 8955, 9156, 9810, 10746, 11445, 11772, 11940, 12537, 13734, 13930, 14715, 15260, 16716, 17910, 19620, 20601, 20895, 21492, 21691, 22890, 25074, 26865, 27468, 27860, 29430, 34335, 35820, 37611, 41202, 41790, 43382, 45780, 50148, 53730, 58860, 62685, 65073, 68670, 75222, 82404, 83580, 86764, 103005, 107460, 108455, 125370, 130146, 137340, 150444, 151837, 188055, 195219, 206010, 216910, 250740, 260292, 303674, 325365, 376110, 390438, 412020, 433820, 455511, 585657, 607348, 650730, 752220, 759185, 780876, 911022, 976095, 1171314, 1301460, 1366533, 1518370, 1822044, 1952190, 2277555, 2342628, 2733066, 2928285, 3036740, 3904380, 4099599, 4555110, 5466132, 5856570, 6832665, 8199198, 9110220, 11713140, 13665330, 16398396, 20497995, 27330660, 40995990, 81991980]

約数ペア:

[(1, 81991980), (2, 40995990), (3, 27330660), (4, 20497995), (5, 16398396), (6, 13665330), (7, 11713140), (9, 9110220), (10, 8199198), (12, 6832665), (14, 5856570), (15, 5466132), (18, 4555110), (20, 4099599), (21, 3904380), (27, 3036740), (28, 2928285), (30, 2733066), (35, 2342628), (36, 2277555), (42, 1952190), (45, 1822044), (54, 1518370), (60, 1366533), (63, 1301460), (70, 1171314), (84, 976095), (90, 911022), (105, 780876), (108, 759185), (109, 752220), (126, 650730), (135, 607348), (140, 585657), (180, 455511), (189, 433820), (199, 412020), (210, 390438), (218, 376110), (252, 325365), (270, 303674), (315, 260292), (327, 250740), (378, 216910), (398, 206010), (420, 195219), (436, 188055), (540, 151837), (545, 150444), (597, 137340), (630, 130146), (654, 125370), (756, 108455), (763, 107460), (796, 103005), (945, 86764), (981, 83580), (995, 82404), (1090, 75222), (1194, 68670), (1260, 65073), (1308, 62685), (1393, 58860), (1526, 53730), (1635, 50148), (1791, 45780), (1890, 43382), (1962, 41790), (1990, 41202), (2180, 37611), (2289, 35820), (2388, 34335), (2786, 29430), (2943, 27860), (2985, 27468), (3052, 26865), (3270, 25074), (3582, 22890), (3780, 21691), (3815, 21492), (3924, 20895), (3980, 20601), (4179, 19620), (4578, 17910), (4905, 16716), (5373, 15260), (5572, 14715), (5886, 13930), (5970, 13734), (6540, 12537), (6867, 11940), (6965, 11772), (7164, 11445), (7630, 10746), (8358, 9810), (8955, 9156)]