21000391768

素因数分解:

$2^3\times {\mathrm{631}}^1\times {\mathrm{4160141}}^1$

素因数の和:4160778

約数の個数: 16

約数和(自身を含む): 39438146160

約数和(自身を除く): 18437754392

約数列:

[1, 2, 4, 8, 631, 1262, 2524, 5048, 4160141, 8320282, 16640564, 33281128, 2625048971, 5250097942, 10500195884, 21000391768]

約数ペア:

[(1, 21000391768), (2, 10500195884), (4, 5250097942), (8, 2625048971), (631, 33281128), (1262, 16640564), (2524, 8320282), (5048, 4160141)]