20861955

素因数分解:

$3^4\times 5^1\times {\mathrm{51511}}^1$

素因数の和:51528

約数の個数: 20

約数和(自身を含む): 37397712

約数和(自身を除く): 16535757

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51511, 154533, 257555, 463599, 772665, 1390797, 2317995, 4172391, 6953985, 20861955]

約数ペア:

[(1, 20861955), (3, 6953985), (5, 4172391), (9, 2317995), (15, 1390797), (27, 772665), (45, 463599), (81, 257555), (135, 154533), (405, 51511)]