21249818

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{3851}}^1$

素因数の和:3973

約数の個数: 16

約数和(自身を含む): 33281280

約数和(自身を除く): 12031462

約数列:

[1, 2, 31, 62, 89, 178, 2759, 3851, 5518, 7702, 119381, 238762, 342739, 685478, 10624909, 21249818]

約数ペア:

[(1, 21249818), (2, 10624909), (31, 685478), (62, 342739), (89, 238762), (178, 119381), (2759, 7702), (3851, 5518)]