21972181

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{4259}}^1$

素因数の和:4344

約数の個数: 16

約数和(自身を含む): 27809280

約数和(自身を除く): 5837099

約数列:

[1, 7, 11, 67, 77, 469, 737, 4259, 5159, 29813, 46849, 285353, 327943, 1997471, 3138883, 21972181]

約数ペア:

[(1, 21972181), (7, 3138883), (11, 1997471), (67, 327943), (77, 285353), (469, 46849), (737, 29813), (4259, 5159)]