21304565

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1\times {\mathrm{503}}^1$

素因数の和:748

約数の個数: 16

約数和(自身を含む): 26345088

約数和(自身を除く): 5040523

約数列:

[1, 5, 43, 197, 215, 503, 985, 2515, 8471, 21629, 42355, 99091, 108145, 495455, 4260913, 21304565]

約数ペア:

[(1, 21304565), (5, 4260913), (43, 495455), (197, 108145), (215, 99091), (503, 42355), (985, 21629), (2515, 8471)]