21000885

素因数分解:

$3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{15731}}^1$

素因数の和:15828

約数の個数: 16

約数和(自身を含む): 33981120

約数和(自身を除く): 12980235

約数列:

[1, 3, 5, 15, 89, 267, 445, 1335, 15731, 47193, 78655, 235965, 1400059, 4200177, 7000295, 21000885]

約数ペア:

[(1, 21000885), (3, 7000295), (5, 4200177), (15, 1400059), (89, 235965), (267, 78655), (445, 47193), (1335, 15731)]