81381960

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{20551}}^1$

素因数の和:20579

約数の個数: 96

約数和(自身を含む): 288550080

約数和(自身を除く): 207168120

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 55, 60, 66, 72, 88, 90, 99, 110, 120, 132, 165, 180, 198, 220, 264, 330, 360, 396, 440, 495, 660, 792, 990, 1320, 1980, 3960, 20551, 41102, 61653, 82204, 102755, 123306, 164408, 184959, 205510, 226061, 246612, 308265, 369918, 411020, 452122, 493224, 616530, 678183, 739836, 822040, 904244, 924795, 1130305, 1233060, 1356366, 1479672, 1808488, 1849590, 2034549, 2260610, 2466120, 2712732, 3390915, 3699180, 4069098, 4521220, 5425464, 6781830, 7398360, 8138196, 9042440, 10172745, 13563660, 16276392, 20345490, 27127320, 40690980, 81381960]

約数ペア:

[(1, 81381960), (2, 40690980), (3, 27127320), (4, 20345490), (5, 16276392), (6, 13563660), (8, 10172745), (9, 9042440), (10, 8138196), (11, 7398360), (12, 6781830), (15, 5425464), (18, 4521220), (20, 4069098), (22, 3699180), (24, 3390915), (30, 2712732), (33, 2466120), (36, 2260610), (40, 2034549), (44, 1849590), (45, 1808488), (55, 1479672), (60, 1356366), (66, 1233060), (72, 1130305), (88, 924795), (90, 904244), (99, 822040), (110, 739836), (120, 678183), (132, 616530), (165, 493224), (180, 452122), (198, 411020), (220, 369918), (264, 308265), (330, 246612), (360, 226061), (396, 205510), (440, 184959), (495, 164408), (660, 123306), (792, 102755), (990, 82204), (1320, 61653), (1980, 41102), (3960, 20551)]