19910529

素因数分解:

$3^4\times {\mathrm{409}}^1\times {\mathrm{601}}^1$

素因数の和:1022

約数の個数: 20

約数和(自身を含む): 29865220

約数和(自身を除く): 9954691

約数列:

[1, 3, 9, 27, 81, 409, 601, 1227, 1803, 3681, 5409, 11043, 16227, 33129, 48681, 245809, 737427, 2212281, 6636843, 19910529]

約数ペア:

[(1, 19910529), (3, 6636843), (9, 2212281), (27, 737427), (81, 245809), (409, 48681), (601, 33129), (1227, 16227), (1803, 11043), (3681, 5409)]