21868420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{863}}^1$

素因数の和:1060

約数の個数: 48

約数和(自身を含む): 52835328

約数和(自身を除く): 30966908

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 181, 362, 724, 863, 905, 1267, 1726, 1810, 2534, 3452, 3620, 4315, 5068, 6041, 6335, 8630, 12082, 12670, 17260, 24164, 25340, 30205, 60410, 120820, 156203, 312406, 624812, 781015, 1093421, 1562030, 2186842, 3124060, 4373684, 5467105, 10934210, 21868420]

約数ペア:

[(1, 21868420), (2, 10934210), (4, 5467105), (5, 4373684), (7, 3124060), (10, 2186842), (14, 1562030), (20, 1093421), (28, 781015), (35, 624812), (70, 312406), (140, 156203), (181, 120820), (362, 60410), (724, 30205), (863, 25340), (905, 24164), (1267, 17260), (1726, 12670), (1810, 12082), (2534, 8630), (3452, 6335), (3620, 6041), (4315, 5068)]