21855285

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 41990400

約数和(自身を除く): 20135115

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 89, 107, 135, 153, 255, 267, 321, 445, 459, 535, 765, 801, 963, 1335, 1513, 1605, 1819, 2295, 2403, 2889, 4005, 4539, 4815, 5457, 7565, 9095, 9523, 12015, 13617, 14445, 16371, 22695, 27285, 28569, 40851, 47615, 49113, 68085, 81855, 85707, 142845, 161891, 204255, 245565, 257121, 428535, 485673, 809455, 1285605, 1457019, 2428365, 4371057, 7285095, 21855285]

約数ペア:

[(1, 21855285), (3, 7285095), (5, 4371057), (9, 2428365), (15, 1457019), (17, 1285605), (27, 809455), (45, 485673), (51, 428535), (85, 257121), (89, 245565), (107, 204255), (135, 161891), (153, 142845), (255, 85707), (267, 81855), (321, 68085), (445, 49113), (459, 47615), (535, 40851), (765, 28569), (801, 27285), (963, 22695), (1335, 16371), (1513, 14445), (1605, 13617), (1819, 12015), (2295, 9523), (2403, 9095), (2889, 7565), (4005, 5457), (4539, 4815)]