19570720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^2$

素因数の和:222

約数の個数: 72

約数和(自身を含む): 50311044

約数和(自身を除く): 30740324

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 97, 104, 130, 160, 194, 208, 260, 388, 416, 485, 520, 776, 970, 1040, 1261, 1552, 1940, 2080, 2522, 3104, 3880, 5044, 6305, 7760, 9409, 10088, 12610, 15520, 18818, 20176, 25220, 37636, 40352, 47045, 50440, 75272, 94090, 100880, 122317, 150544, 188180, 201760, 244634, 301088, 376360, 489268, 611585, 752720, 978536, 1223170, 1505440, 1957072, 2446340, 3914144, 4892680, 9785360, 19570720]

約数ペア:

[(1, 19570720), (2, 9785360), (4, 4892680), (5, 3914144), (8, 2446340), (10, 1957072), (13, 1505440), (16, 1223170), (20, 978536), (26, 752720), (32, 611585), (40, 489268), (52, 376360), (65, 301088), (80, 244634), (97, 201760), (104, 188180), (130, 150544), (160, 122317), (194, 100880), (208, 94090), (260, 75272), (388, 50440), (416, 47045), (485, 40352), (520, 37636), (776, 25220), (970, 20176), (1040, 18818), (1261, 15520), (1552, 12610), (1940, 10088), (2080, 9409), (2522, 7760), (3104, 6305), (3880, 5044)]