21247995

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{30139}}^1$

素因数の和:30194

約数の個数: 16

約数和(自身を含む): 34721280

約数和(自身を除く): 13473285

約数列:

[1, 3, 5, 15, 47, 141, 235, 705, 30139, 90417, 150695, 452085, 1416533, 4249599, 7082665, 21247995]

約数ペア:

[(1, 21247995), (3, 7082665), (5, 4249599), (15, 1416533), (47, 452085), (141, 150695), (235, 90417), (705, 30139)]