21122143

素因数分解:

$7^1\times {\mathrm{17}}^2\times {\mathrm{53}}^1\times {\mathrm{197}}^1$

素因数の和:291

約数の個数: 24

約数和(自身を含む): 26259552

約数和(自身を除く): 5137409

約数列:

[1, 7, 17, 53, 119, 197, 289, 371, 901, 1379, 2023, 3349, 6307, 10441, 15317, 23443, 56933, 73087, 107219, 177497, 398531, 1242479, 3017449, 21122143]

約数ペア:

[(1, 21122143), (7, 3017449), (17, 1242479), (53, 398531), (119, 177497), (197, 107219), (289, 73087), (371, 56933), (901, 23443), (1379, 15317), (2023, 10441), (3349, 6307)]