81939520

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19697}}^1$

素因数の和:19727

約数の個数: 56

約数和(自身を含む): 210138264

約数和(自身を除く): 128198744

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 19697, 39394, 78788, 98485, 157576, 196970, 256061, 315152, 393940, 512122, 630304, 787880, 1024244, 1260608, 1280305, 1575760, 2048488, 2560610, 3151520, 4096976, 5121220, 6303040, 8193952, 10242440, 16387904, 20484880, 40969760, 81939520]

約数ペア:

[(1, 81939520), (2, 40969760), (4, 20484880), (5, 16387904), (8, 10242440), (10, 8193952), (13, 6303040), (16, 5121220), (20, 4096976), (26, 3151520), (32, 2560610), (40, 2048488), (52, 1575760), (64, 1280305), (65, 1260608), (80, 1024244), (104, 787880), (130, 630304), (160, 512122), (208, 393940), (260, 315152), (320, 256061), (416, 196970), (520, 157576), (832, 98485), (1040, 78788), (2080, 39394), (4160, 19697)]