81240440

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{547}}^1$

素因数の和:684

約数の個数: 64

約数和(自身を含む): 189388800

約数和(自身を除く): 108148360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 79, 94, 158, 188, 235, 316, 376, 395, 470, 547, 632, 790, 940, 1094, 1580, 1880, 2188, 2735, 3160, 3713, 4376, 5470, 7426, 10940, 14852, 18565, 21880, 25709, 29704, 37130, 43213, 51418, 74260, 86426, 102836, 128545, 148520, 172852, 205672, 216065, 257090, 345704, 432130, 514180, 864260, 1028360, 1728520, 2031011, 4062022, 8124044, 10155055, 16248088, 20310110, 40620220, 81240440]

約数ペア:

[(1, 81240440), (2, 40620220), (4, 20310110), (5, 16248088), (8, 10155055), (10, 8124044), (20, 4062022), (40, 2031011), (47, 1728520), (79, 1028360), (94, 864260), (158, 514180), (188, 432130), (235, 345704), (316, 257090), (376, 216065), (395, 205672), (470, 172852), (547, 148520), (632, 128545), (790, 102836), (940, 86426), (1094, 74260), (1580, 51418), (1880, 43213), (2188, 37130), (2735, 29704), (3160, 25709), (3713, 21880), (4376, 18565), (5470, 14852), (7426, 10940)]