20723080

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:231

約数の個数: 96

約数和(自身を含む): 55301400

約数和(自身を除く): 34578320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 97, 98, 109, 140, 194, 196, 218, 245, 280, 388, 392, 436, 485, 490, 545, 679, 763, 776, 872, 970, 980, 1090, 1358, 1526, 1940, 1960, 2180, 2716, 3052, 3395, 3815, 3880, 4360, 4753, 5341, 5432, 6104, 6790, 7630, 9506, 10573, 10682, 13580, 15260, 19012, 21146, 21364, 23765, 26705, 27160, 30520, 38024, 42292, 42728, 47530, 52865, 53410, 74011, 84584, 95060, 105730, 106820, 148022, 190120, 211460, 213640, 296044, 370055, 422920, 518077, 592088, 740110, 1036154, 1480220, 2072308, 2590385, 2960440, 4144616, 5180770, 10361540, 20723080]

約数ペア:

[(1, 20723080), (2, 10361540), (4, 5180770), (5, 4144616), (7, 2960440), (8, 2590385), (10, 2072308), (14, 1480220), (20, 1036154), (28, 740110), (35, 592088), (40, 518077), (49, 422920), (56, 370055), (70, 296044), (97, 213640), (98, 211460), (109, 190120), (140, 148022), (194, 106820), (196, 105730), (218, 95060), (245, 84584), (280, 74011), (388, 53410), (392, 52865), (436, 47530), (485, 42728), (490, 42292), (545, 38024), (679, 30520), (763, 27160), (776, 26705), (872, 23765), (970, 21364), (980, 21146), (1090, 19012), (1358, 15260), (1526, 13580), (1940, 10682), (1960, 10573), (2180, 9506), (2716, 7630), (3052, 6790), (3395, 6104), (3815, 5432), (3880, 5341), (4360, 4753)]