20981787

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{2221}}^1$

素因数の和:2338

約数の個数: 16

約数和(自身を含む): 29010432

約数和(自身を除く): 8028645

約数列:

[1, 3, 47, 67, 141, 201, 2221, 3149, 6663, 9447, 104387, 148807, 313161, 446421, 6993929, 20981787]

約数ペア:

[(1, 20981787), (3, 6993929), (47, 446421), (67, 313161), (141, 148807), (201, 104387), (2221, 9447), (3149, 6663)]