19770905

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{577}}^1$

素因数の和:689

約数の個数: 32

約数和(自身を含む): 29963520

約数和(自身を除く): 10192615

約数列:

[1, 5, 7, 11, 35, 55, 77, 89, 385, 445, 577, 623, 979, 2885, 3115, 4039, 4895, 6347, 6853, 20195, 31735, 34265, 44429, 51353, 222145, 256765, 359471, 564883, 1797355, 2824415, 3954181, 19770905]

約数ペア:

[(1, 19770905), (5, 3954181), (7, 2824415), (11, 1797355), (35, 564883), (55, 359471), (77, 256765), (89, 222145), (385, 51353), (445, 44429), (577, 34265), (623, 31735), (979, 20195), (2885, 6853), (3115, 6347), (4039, 4895)]