21571215

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{2917}}^1$

素因数の和:2971

約数の個数: 32

約数和(自身を含む): 37817280

約数和(自身を除く): 16246065

約数列:

[1, 3, 5, 15, 17, 29, 51, 85, 87, 145, 255, 435, 493, 1479, 2465, 2917, 7395, 8751, 14585, 43755, 49589, 84593, 148767, 247945, 253779, 422965, 743835, 1268895, 1438081, 4314243, 7190405, 21571215]

約数ペア:

[(1, 21571215), (3, 7190405), (5, 4314243), (15, 1438081), (17, 1268895), (29, 743835), (51, 422965), (85, 253779), (87, 247945), (145, 148767), (255, 84593), (435, 49589), (493, 43755), (1479, 14585), (2465, 8751), (2917, 7395)]