21125715

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{827}}^1$

素因数の和:979

約数の個数: 32

約数和(自身を含む): 36723456

約数和(自身を除く): 15597741

約数列:

[1, 3, 5, 13, 15, 39, 65, 131, 195, 393, 655, 827, 1703, 1965, 2481, 4135, 5109, 8515, 10751, 12405, 25545, 32253, 53755, 108337, 161265, 325011, 541685, 1408381, 1625055, 4225143, 7041905, 21125715]

約数ペア:

[(1, 21125715), (3, 7041905), (5, 4225143), (13, 1625055), (15, 1408381), (39, 541685), (65, 325011), (131, 161265), (195, 108337), (393, 53755), (655, 32253), (827, 25545), (1703, 12405), (1965, 10751), (2481, 8515), (4135, 5109)]