640638719

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{227}}^1\times {\mathrm{7607}}^1$

素因数の和:7894

約数の個数: 16

約数和(自身を含む): 749357568

約数和(自身を除く): 108718849

約数列:

[1, 7, 53, 227, 371, 1589, 7607, 12031, 53249, 84217, 403171, 1726789, 2822197, 12087523, 91519817, 640638719]

約数ペア:

[(1, 640638719), (7, 91519817), (53, 12087523), (227, 2822197), (371, 1726789), (1589, 403171), (7607, 84217), (12031, 53249)]