19403955

素因数分解:

$3^4\times 5^1\times {\mathrm{47911}}^1$

素因数の和:47928

約数の個数: 20

約数和(自身を含む): 34784112

約数和(自身を除く): 15380157

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 47911, 143733, 239555, 431199, 718665, 1293597, 2155995, 3880791, 6467985, 19403955]

約数ペア:

[(1, 19403955), (3, 6467985), (5, 3880791), (9, 2155995), (15, 1293597), (27, 718665), (45, 431199), (81, 239555), (135, 143733), (405, 47911)]