21272860

素因数分解:

$2^2\times 5^1\times 7^4\times {\mathrm{443}}^1$

素因数の和:480

約数の個数: 60

約数和(自身を含む): 52233048

約数和(自身を除く): 30960188

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 443, 490, 686, 886, 980, 1372, 1715, 1772, 2215, 2401, 3101, 3430, 4430, 4802, 6202, 6860, 8860, 9604, 12005, 12404, 15505, 21707, 24010, 31010, 43414, 48020, 62020, 86828, 108535, 151949, 217070, 303898, 434140, 607796, 759745, 1063643, 1519490, 2127286, 3038980, 4254572, 5318215, 10636430, 21272860]

約数ペア:

[(1, 21272860), (2, 10636430), (4, 5318215), (5, 4254572), (7, 3038980), (10, 2127286), (14, 1519490), (20, 1063643), (28, 759745), (35, 607796), (49, 434140), (70, 303898), (98, 217070), (140, 151949), (196, 108535), (245, 86828), (343, 62020), (443, 48020), (490, 43414), (686, 31010), (886, 24010), (980, 21707), (1372, 15505), (1715, 12404), (1772, 12005), (2215, 9604), (2401, 8860), (3101, 6860), (3430, 6202), (4430, 4802)]