81437840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{179}}^1$

素因数の和:261

約数の個数: 120

約数和(自身を含む): 213736320

約数和(自身を除く): 132298480

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 47, 55, 80, 88, 94, 110, 121, 176, 179, 188, 220, 235, 242, 358, 376, 440, 470, 484, 517, 605, 716, 752, 880, 895, 940, 968, 1034, 1210, 1432, 1790, 1880, 1936, 1969, 2068, 2420, 2585, 2864, 3580, 3760, 3938, 4136, 4840, 5170, 5687, 7160, 7876, 8272, 8413, 9680, 9845, 10340, 11374, 14320, 15752, 16826, 19690, 20680, 21659, 22748, 28435, 31504, 33652, 39380, 41360, 42065, 43318, 45496, 56870, 67304, 78760, 84130, 86636, 90992, 92543, 108295, 113740, 134608, 157520, 168260, 173272, 185086, 216590, 227480, 336520, 346544, 370172, 433180, 454960, 462715, 673040, 740344, 866360, 925430, 1017973, 1480688, 1732720, 1850860, 2035946, 3701720, 4071892, 5089865, 7403440, 8143784, 10179730, 16287568, 20359460, 40718920, 81437840]

約数ペア:

[(1, 81437840), (2, 40718920), (4, 20359460), (5, 16287568), (8, 10179730), (10, 8143784), (11, 7403440), (16, 5089865), (20, 4071892), (22, 3701720), (40, 2035946), (44, 1850860), (47, 1732720), (55, 1480688), (80, 1017973), (88, 925430), (94, 866360), (110, 740344), (121, 673040), (176, 462715), (179, 454960), (188, 433180), (220, 370172), (235, 346544), (242, 336520), (358, 227480), (376, 216590), (440, 185086), (470, 173272), (484, 168260), (517, 157520), (605, 134608), (716, 113740), (752, 108295), (880, 92543), (895, 90992), (940, 86636), (968, 84130), (1034, 78760), (1210, 67304), (1432, 56870), (1790, 45496), (1880, 43318), (1936, 42065), (1969, 41360), (2068, 39380), (2420, 33652), (2585, 31504), (2864, 28435), (3580, 22748), (3760, 21659), (3938, 20680), (4136, 19690), (4840, 16826), (5170, 15752), (5687, 14320), (7160, 11374), (7876, 10340), (8272, 9845), (8413, 9680)]