21854205

素因数分解:

$3^5\times 5^1\times {\mathrm{17987}}^1$

素因数の和:18007

約数の個数: 24

約数和(自身を含む): 39285792

約数和(自身を除く): 17431587

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17987, 53961, 89935, 161883, 269805, 485649, 809415, 1456947, 2428245, 4370841, 7284735, 21854205]

約数ペア:

[(1, 21854205), (3, 7284735), (5, 4370841), (9, 2428245), (15, 1456947), (27, 809415), (45, 485649), (81, 269805), (135, 161883), (243, 89935), (405, 53961), (1215, 17987)]