19778558

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{2141}}^1$

素因数の和:2323

約数の個数: 16

約数和(自身を含む): 30844800

約数和(自身を除く): 11066242

約数列:

[1, 2, 31, 62, 149, 298, 2141, 4282, 4619, 9238, 66371, 132742, 319009, 638018, 9889279, 19778558]

約数ペア:

[(1, 19778558), (2, 9889279), (31, 638018), (62, 319009), (149, 132742), (298, 66371), (2141, 9238), (4282, 4619)]