21261815

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{8069}}^1$

素因数の和:8122

約数の個数: 16

約数和(自身を含む): 27889920

約数和(自身を除く): 6628105

約数列:

[1, 5, 17, 31, 85, 155, 527, 2635, 8069, 40345, 137173, 250139, 685865, 1250695, 4252363, 21261815]

約数ペア:

[(1, 21261815), (5, 4252363), (17, 1250695), (31, 685865), (85, 250139), (155, 137173), (527, 40345), (2635, 8069)]