21307325

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1237}}^1$

素因数の和:1313

約数の個数: 24

約数和(自身を含む): 29013768

約数和(自身を除く): 7706443

約数列:

[1, 5, 13, 25, 53, 65, 265, 325, 689, 1237, 1325, 3445, 6185, 16081, 17225, 30925, 65561, 80405, 327805, 402025, 852293, 1639025, 4261465, 21307325]

約数ペア:

[(1, 21307325), (5, 4261465), (13, 1639025), (25, 852293), (53, 402025), (65, 327805), (265, 80405), (325, 65561), (689, 30925), (1237, 17225), (1325, 16081), (3445, 6185)]