21228485

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{223}}^1\times {\mathrm{241}}^1$

素因数の和:548

約数の個数: 16

約数和(自身を含む): 26019840

約数和(自身を除く): 4791355

約数列:

[1, 5, 79, 223, 241, 395, 1115, 1205, 17617, 19039, 53743, 88085, 95195, 268715, 4245697, 21228485]

約数ペア:

[(1, 21228485), (5, 4245697), (79, 268715), (223, 95195), (241, 88085), (395, 53743), (1115, 19039), (1205, 17617)]