21392305

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{3851}}^1$

素因数の和:3968

約数の個数: 16

約数和(自身を含む): 28289088

約数和(自身を除く): 6896783

約数列:

[1, 5, 11, 55, 101, 505, 1111, 3851, 5555, 19255, 42361, 211805, 388951, 1944755, 4278461, 21392305]

約数ペア:

[(1, 21392305), (5, 4278461), (11, 1944755), (55, 388951), (101, 211805), (505, 42361), (1111, 19255), (3851, 5555)]