19970121

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{557}}^1$

素因数の和:633

約数の個数: 32

約数和(自身を含む): 30533760

約数和(自身を除く): 10563639

約数列:

[1, 3, 17, 19, 37, 51, 57, 111, 323, 557, 629, 703, 969, 1671, 1887, 2109, 9469, 10583, 11951, 20609, 28407, 31749, 35853, 61827, 179911, 350353, 391571, 539733, 1051059, 1174713, 6656707, 19970121]

約数ペア:

[(1, 19970121), (3, 6656707), (17, 1174713), (19, 1051059), (37, 539733), (51, 391571), (57, 350353), (111, 179911), (323, 61827), (557, 35853), (629, 31749), (703, 28407), (969, 20609), (1671, 11951), (1887, 10583), (2109, 9469)]