21421552

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{173}}^1$

素因数の和:361

約数の個数: 40

約数和(自身を含む): 42720480

約数和(自身を除く): 21298928

約数列:

[1, 2, 4, 8, 16, 71, 109, 142, 173, 218, 284, 346, 436, 568, 692, 872, 1136, 1384, 1744, 2768, 7739, 12283, 15478, 18857, 24566, 30956, 37714, 49132, 61912, 75428, 98264, 123824, 150856, 196528, 301712, 1338847, 2677694, 5355388, 10710776, 21421552]

約数ペア:

[(1, 21421552), (2, 10710776), (4, 5355388), (8, 2677694), (16, 1338847), (71, 301712), (109, 196528), (142, 150856), (173, 123824), (218, 98264), (284, 75428), (346, 61912), (436, 49132), (568, 37714), (692, 30956), (872, 24566), (1136, 18857), (1384, 15478), (1744, 12283), (2768, 7739)]