19980207

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{439}}^1$

素因数の和:847

約数の個数: 24

約数和(自身を含む): 31231200

約数和(自身を除く): 11250993

約数列:

[1, 3, 9, 13, 39, 117, 389, 439, 1167, 1317, 3501, 3951, 5057, 5707, 15171, 17121, 45513, 51363, 170771, 512313, 1536939, 2220023, 6660069, 19980207]

約数ペア:

[(1, 19980207), (3, 6660069), (9, 2220023), (13, 1536939), (39, 512313), (117, 170771), (389, 51363), (439, 45513), (1167, 17121), (1317, 15171), (3501, 5707), (3951, 5057)]