81420080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{347}}^1\times {\mathrm{419}}^1$

素因数の和:786

約数の個数: 80

約数和(自身を含む): 217486080

約数和(自身を除く): 136066000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 347, 419, 560, 694, 838, 1388, 1676, 1735, 2095, 2429, 2776, 2933, 3352, 3470, 4190, 4858, 5552, 5866, 6704, 6940, 8380, 9716, 11732, 12145, 13880, 14665, 16760, 19432, 23464, 24290, 27760, 29330, 33520, 38864, 46928, 48580, 58660, 97160, 117320, 145393, 194320, 234640, 290786, 581572, 726965, 1017751, 1163144, 1453930, 2035502, 2326288, 2907860, 4071004, 5088755, 5815720, 8142008, 10177510, 11631440, 16284016, 20355020, 40710040, 81420080]

約数ペア:

[(1, 81420080), (2, 40710040), (4, 20355020), (5, 16284016), (7, 11631440), (8, 10177510), (10, 8142008), (14, 5815720), (16, 5088755), (20, 4071004), (28, 2907860), (35, 2326288), (40, 2035502), (56, 1453930), (70, 1163144), (80, 1017751), (112, 726965), (140, 581572), (280, 290786), (347, 234640), (419, 194320), (560, 145393), (694, 117320), (838, 97160), (1388, 58660), (1676, 48580), (1735, 46928), (2095, 38864), (2429, 33520), (2776, 29330), (2933, 27760), (3352, 24290), (3470, 23464), (4190, 19432), (4858, 16760), (5552, 14665), (5866, 13880), (6704, 12145), (6940, 11732), (8380, 9716)]