19990491

素因数分解:

$3^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1\times {\mathrm{541}}^1$

素因数の和:766

約数の個数: 16

約数和(自身を含む): 27186720

約数和(自身を除く): 7196229

約数列:

[1, 3, 109, 113, 327, 339, 541, 1623, 12317, 36951, 58969, 61133, 176907, 183399, 6663497, 19990491]

約数ペア:

[(1, 19990491), (3, 6663497), (109, 183399), (113, 176907), (327, 61133), (339, 58969), (541, 36951), (1623, 12317)]