19638387

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{421}}^1$

素因数の和:571

約数の個数: 24

約数和(自身を含む): 29229408

約数和(自身を除く): 9591021

約数列:

[1, 3, 9, 71, 73, 213, 219, 421, 639, 657, 1263, 3789, 5183, 15549, 29891, 30733, 46647, 89673, 92199, 269019, 276597, 2182043, 6546129, 19638387]

約数ペア:

[(1, 19638387), (3, 6546129), (9, 2182043), (71, 276597), (73, 269019), (213, 92199), (219, 89673), (421, 46647), (639, 30733), (657, 29891), (1263, 15549), (3789, 5183)]