21042385

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{449}}^1$

素因数の和:577

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10407215

約数列:

[1, 5, 7, 13, 35, 65, 91, 103, 449, 455, 515, 721, 1339, 2245, 3143, 3605, 5837, 6695, 9373, 15715, 29185, 40859, 46247, 46865, 204295, 231235, 323729, 601211, 1618645, 3006055, 4208477, 21042385]

約数ペア:

[(1, 21042385), (5, 4208477), (7, 3006055), (13, 1618645), (35, 601211), (65, 323729), (91, 231235), (103, 204295), (449, 46865), (455, 46247), (515, 40859), (721, 29185), (1339, 15715), (2245, 9373), (3143, 6695), (3605, 5837)]