19996280

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{229}}^1$

素因数の和:336

約数の個数: 64

約数和(自身を含む): 47196000

約数和(自身を除く): 27199720

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 59, 74, 118, 148, 185, 229, 236, 295, 296, 370, 458, 472, 590, 740, 916, 1145, 1180, 1480, 1832, 2183, 2290, 2360, 4366, 4580, 8473, 8732, 9160, 10915, 13511, 16946, 17464, 21830, 27022, 33892, 42365, 43660, 54044, 67555, 67784, 84730, 87320, 108088, 135110, 169460, 270220, 338920, 499907, 540440, 999814, 1999628, 2499535, 3999256, 4999070, 9998140, 19996280]

約数ペア:

[(1, 19996280), (2, 9998140), (4, 4999070), (5, 3999256), (8, 2499535), (10, 1999628), (20, 999814), (37, 540440), (40, 499907), (59, 338920), (74, 270220), (118, 169460), (148, 135110), (185, 108088), (229, 87320), (236, 84730), (295, 67784), (296, 67555), (370, 54044), (458, 43660), (472, 42365), (590, 33892), (740, 27022), (916, 21830), (1145, 17464), (1180, 16946), (1480, 13511), (1832, 10915), (2183, 9160), (2290, 8732), (2360, 8473), (4366, 4580)]