391636

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:279

約数の個数: 24

約数和(自身を含む): 798336

約数和(自身を除く): 406700

約数列:

[1, 2, 4, 7, 14, 28, 71, 142, 197, 284, 394, 497, 788, 994, 1379, 1988, 2758, 5516, 13987, 27974, 55948, 97909, 195818, 391636]

約数ペア:

[(1, 391636), (2, 195818), (4, 97909), (7, 55948), (14, 27974), (28, 13987), (71, 5516), (142, 2758), (197, 1988), (284, 1379), (394, 994), (497, 788)]