19781451

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{3989}}^1$

素因数の和:4043

約数の個数: 24

約数和(自身を含む): 31122000

約数和(自身を除く): 11340549

約数列:

[1, 3, 9, 19, 29, 57, 87, 171, 261, 551, 1653, 3989, 4959, 11967, 35901, 75791, 115681, 227373, 347043, 682119, 1041129, 2197939, 6593817, 19781451]

約数ペア:

[(1, 19781451), (3, 6593817), (9, 2197939), (19, 1041129), (29, 682119), (57, 347043), (87, 227373), (171, 115681), (261, 75791), (551, 35901), (1653, 11967), (3989, 4959)]