21053715

素因数分解:

$3^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{13627}}^1$

素因数の和:13738

約数の個数: 16

約数和(自身を含む): 34015488

約数和(自身を除く): 12961773

約数列:

[1, 3, 5, 15, 103, 309, 515, 1545, 13627, 40881, 68135, 204405, 1403581, 4210743, 7017905, 21053715]

約数ペア:

[(1, 21053715), (3, 7017905), (5, 4210743), (15, 1403581), (103, 204405), (309, 68135), (515, 40881), (1545, 13627)]