19957995

素因数分解:

$3^4\times 5^1\times {\mathrm{49279}}^1$

素因数の和:49296

約数の個数: 20

約数和(自身を含む): 35777280

約数和(自身を除く): 15819285

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49279, 147837, 246395, 443511, 739185, 1330533, 2217555, 3991599, 6652665, 19957995]

約数ペア:

[(1, 19957995), (3, 6652665), (5, 3991599), (9, 2217555), (15, 1330533), (27, 739185), (45, 443511), (81, 246395), (135, 147837), (405, 49279)]