20090821

素因数分解:

${\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{569}}^1$

素因数の和:684

約数の個数: 16

約数和(自身を含む): 22325760

約数和(自身を除く): 2234939

約数列:

[1, 17, 31, 67, 527, 569, 1139, 2077, 9673, 17639, 35309, 38123, 299863, 648091, 1181813, 20090821]

約数ペア:

[(1, 20090821), (17, 1181813), (31, 648091), (67, 299863), (527, 38123), (569, 35309), (1139, 17639), (2077, 9673)]