81998840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{337}}^1$

素因数の和:445

約数の個数: 128

約数和(自身を含む): 233625600

約数和(自身を除く): 151626760

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 79, 88, 110, 140, 154, 158, 220, 280, 308, 316, 337, 385, 395, 440, 553, 616, 632, 674, 770, 790, 869, 1106, 1348, 1540, 1580, 1685, 1738, 2212, 2359, 2696, 2765, 3080, 3160, 3370, 3476, 3707, 4345, 4424, 4718, 5530, 6083, 6740, 6952, 7414, 8690, 9436, 11060, 11795, 12166, 13480, 14828, 17380, 18535, 18872, 22120, 23590, 24332, 25949, 26623, 29656, 30415, 34760, 37070, 47180, 48664, 51898, 53246, 60830, 74140, 94360, 103796, 106492, 121660, 129745, 133115, 148280, 186361, 207592, 212984, 243320, 259490, 266230, 292853, 372722, 518980, 532460, 585706, 745444, 931805, 1037960, 1064920, 1171412, 1464265, 1490888, 1863610, 2049971, 2342824, 2928530, 3727220, 4099942, 5857060, 7454440, 8199884, 10249855, 11714120, 16399768, 20499710, 40999420, 81998840]

約数ペア:

[(1, 81998840), (2, 40999420), (4, 20499710), (5, 16399768), (7, 11714120), (8, 10249855), (10, 8199884), (11, 7454440), (14, 5857060), (20, 4099942), (22, 3727220), (28, 2928530), (35, 2342824), (40, 2049971), (44, 1863610), (55, 1490888), (56, 1464265), (70, 1171412), (77, 1064920), (79, 1037960), (88, 931805), (110, 745444), (140, 585706), (154, 532460), (158, 518980), (220, 372722), (280, 292853), (308, 266230), (316, 259490), (337, 243320), (385, 212984), (395, 207592), (440, 186361), (553, 148280), (616, 133115), (632, 129745), (674, 121660), (770, 106492), (790, 103796), (869, 94360), (1106, 74140), (1348, 60830), (1540, 53246), (1580, 51898), (1685, 48664), (1738, 47180), (2212, 37070), (2359, 34760), (2696, 30415), (2765, 29656), (3080, 26623), (3160, 25949), (3370, 24332), (3476, 23590), (3707, 22120), (4345, 18872), (4424, 18535), (4718, 17380), (5530, 14828), (6083, 13480), (6740, 12166), (6952, 11795), (7414, 11060), (8690, 9436)]