21221985

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{449}}^1$

素因数の和:617

約数の個数: 32

約数和(自身を含む): 35769600

約数和(自身を除く): 14547615

約数列:

[1, 3, 5, 15, 23, 69, 115, 137, 345, 411, 449, 685, 1347, 2055, 2245, 3151, 6735, 9453, 10327, 15755, 30981, 47265, 51635, 61513, 154905, 184539, 307565, 922695, 1414799, 4244397, 7073995, 21221985]

約数ペア:

[(1, 21221985), (3, 7073995), (5, 4244397), (15, 1414799), (23, 922695), (69, 307565), (115, 184539), (137, 154905), (345, 61513), (411, 51635), (449, 47265), (685, 30981), (1347, 15755), (2055, 10327), (2245, 9453), (3151, 6735)]