81345880

素因数分解:

$2^3\times 5^1\times 7^5\times {\mathrm{11}}^2$

素因数の和:68

約数の個数: 144

約数和(自身を含む): 234707760

約数和(自身を除く): 153361880

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 88, 98, 110, 121, 140, 154, 196, 220, 242, 245, 280, 308, 343, 385, 392, 440, 484, 490, 539, 605, 616, 686, 770, 847, 968, 980, 1078, 1210, 1372, 1540, 1694, 1715, 1960, 2156, 2401, 2420, 2695, 2744, 3080, 3388, 3430, 3773, 4235, 4312, 4802, 4840, 5390, 5929, 6776, 6860, 7546, 8470, 9604, 10780, 11858, 12005, 13720, 15092, 16807, 16940, 18865, 19208, 21560, 23716, 24010, 26411, 29645, 30184, 33614, 33880, 37730, 41503, 47432, 48020, 52822, 59290, 67228, 75460, 83006, 84035, 96040, 105644, 118580, 132055, 134456, 150920, 166012, 168070, 184877, 207515, 211288, 237160, 264110, 290521, 332024, 336140, 369754, 415030, 528220, 581042, 672280, 739508, 830060, 924385, 1056440, 1162084, 1452605, 1479016, 1660120, 1848770, 2033647, 2324168, 2905210, 3697540, 4067294, 5810420, 7395080, 8134588, 10168235, 11620840, 16269176, 20336470, 40672940, 81345880]

約数ペア:

[(1, 81345880), (2, 40672940), (4, 20336470), (5, 16269176), (7, 11620840), (8, 10168235), (10, 8134588), (11, 7395080), (14, 5810420), (20, 4067294), (22, 3697540), (28, 2905210), (35, 2324168), (40, 2033647), (44, 1848770), (49, 1660120), (55, 1479016), (56, 1452605), (70, 1162084), (77, 1056440), (88, 924385), (98, 830060), (110, 739508), (121, 672280), (140, 581042), (154, 528220), (196, 415030), (220, 369754), (242, 336140), (245, 332024), (280, 290521), (308, 264110), (343, 237160), (385, 211288), (392, 207515), (440, 184877), (484, 168070), (490, 166012), (539, 150920), (605, 134456), (616, 132055), (686, 118580), (770, 105644), (847, 96040), (968, 84035), (980, 83006), (1078, 75460), (1210, 67228), (1372, 59290), (1540, 52822), (1694, 48020), (1715, 47432), (1960, 41503), (2156, 37730), (2401, 33880), (2420, 33614), (2695, 30184), (2744, 29645), (3080, 26411), (3388, 24010), (3430, 23716), (3773, 21560), (4235, 19208), (4312, 18865), (4802, 16940), (4840, 16807), (5390, 15092), (5929, 13720), (6776, 12005), (6860, 11858), (7546, 10780), (8470, 9604)]