18940805

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 26435808

約数和(自身を除く): 7495003

約数列:

[1, 5, 13, 17, 61, 65, 85, 221, 281, 305, 793, 1037, 1105, 1405, 3653, 3965, 4777, 5185, 13481, 17141, 18265, 23885, 62101, 67405, 85705, 222833, 291397, 310505, 1114165, 1456985, 3788161, 18940805]

約数ペア:

[(1, 18940805), (5, 3788161), (13, 1456985), (17, 1114165), (61, 310505), (65, 291397), (85, 222833), (221, 85705), (281, 67405), (305, 62101), (793, 23885), (1037, 18265), (1105, 17141), (1405, 13481), (3653, 5185), (3965, 4777)]