21591445

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{389}}^1\times {\mathrm{653}}^1$

素因数の和:1064

約数の個数: 16

約数和(自身を含む): 27546480

約数和(自身を除く): 5955035

約数列:

[1, 5, 17, 85, 389, 653, 1945, 3265, 6613, 11101, 33065, 55505, 254017, 1270085, 4318289, 21591445]

約数ペア:

[(1, 21591445), (5, 4318289), (17, 1270085), (85, 254017), (389, 55505), (653, 33065), (1945, 11101), (3265, 6613)]