19908021

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{15541}}^1$

素因数の和:15612

約数の個数: 16

約数和(自身を含む): 30835328

約数和(自身を除く): 10927307

約数列:

[1, 3, 7, 21, 61, 183, 427, 1281, 15541, 46623, 108787, 326361, 948001, 2844003, 6636007, 19908021]

約数ペア:

[(1, 19908021), (3, 6636007), (7, 2844003), (21, 948001), (61, 326361), (183, 108787), (427, 46623), (1281, 15541)]