20897595

素因数分解:

$3^4\times 5^1\times {\mathrm{51599}}^1$

素因数の和:51616

約数の個数: 20

約数和(自身を含む): 37461600

約数和(自身を除く): 16564005

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51599, 154797, 257995, 464391, 773985, 1393173, 2321955, 4179519, 6965865, 20897595]

約数ペア:

[(1, 20897595), (3, 6965865), (5, 4179519), (9, 2321955), (15, 1393173), (27, 773985), (45, 464391), (81, 257995), (135, 154797), (405, 51599)]