81364520

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1\times {\mathrm{383}}^1$

素因数の和:554

約数の個数: 64

約数和(自身を含む): 189112320

約数和(自身を除く): 107747800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 113, 188, 226, 235, 376, 383, 452, 470, 565, 766, 904, 940, 1130, 1532, 1880, 1915, 2260, 3064, 3830, 4520, 5311, 7660, 10622, 15320, 18001, 21244, 26555, 36002, 42488, 43279, 53110, 72004, 86558, 90005, 106220, 144008, 173116, 180010, 212440, 216395, 346232, 360020, 432790, 720040, 865580, 1731160, 2034113, 4068226, 8136452, 10170565, 16272904, 20341130, 40682260, 81364520]

約数ペア:

[(1, 81364520), (2, 40682260), (4, 20341130), (5, 16272904), (8, 10170565), (10, 8136452), (20, 4068226), (40, 2034113), (47, 1731160), (94, 865580), (113, 720040), (188, 432790), (226, 360020), (235, 346232), (376, 216395), (383, 212440), (452, 180010), (470, 173116), (565, 144008), (766, 106220), (904, 90005), (940, 86558), (1130, 72004), (1532, 53110), (1880, 43279), (1915, 42488), (2260, 36002), (3064, 26555), (3830, 21244), (4520, 18001), (5311, 15320), (7660, 10622)]