644979205

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{443}}^1\times {\mathrm{1723}}^1$

素因数の和:2197

約数の個数: 24

約数和(自身を含む): 840470688

約数和(自身を除く): 195491483

約数列:

[1, 5, 13, 65, 169, 443, 845, 1723, 2215, 5759, 8615, 22399, 28795, 74867, 111995, 291187, 374335, 763289, 1455935, 3816445, 9922757, 49613785, 128995841, 644979205]

約数ペア:

[(1, 644979205), (5, 128995841), (13, 49613785), (65, 9922757), (169, 3816445), (443, 1455935), (845, 763289), (1723, 374335), (2215, 291187), (5759, 111995), (8615, 74867), (22399, 28795)]