81531180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{15619}}^1$

素因数の和:15663

約数の個数: 72

約数和(自身を含む): 255855600

約数和(自身を除く): 174324420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 5220, 15619, 31238, 46857, 62476, 78095, 93714, 140571, 156190, 187428, 234285, 281142, 312380, 452951, 468570, 562284, 702855, 905902, 937140, 1358853, 1405710, 1811804, 2264755, 2717706, 2811420, 4076559, 4529510, 5435412, 6794265, 8153118, 9059020, 13588530, 16306236, 20382795, 27177060, 40765590, 81531180]

約数ペア:

[(1, 81531180), (2, 40765590), (3, 27177060), (4, 20382795), (5, 16306236), (6, 13588530), (9, 9059020), (10, 8153118), (12, 6794265), (15, 5435412), (18, 4529510), (20, 4076559), (29, 2811420), (30, 2717706), (36, 2264755), (45, 1811804), (58, 1405710), (60, 1358853), (87, 937140), (90, 905902), (116, 702855), (145, 562284), (174, 468570), (180, 452951), (261, 312380), (290, 281142), (348, 234285), (435, 187428), (522, 156190), (580, 140571), (870, 93714), (1044, 78095), (1305, 62476), (1740, 46857), (2610, 31238), (5220, 15619)]