20404345

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{6679}}^1$

素因数の和:6744

約数の個数: 16

約数和(自身を含む): 26933760

約数和(自身を除く): 6529415

約数列:

[1, 5, 13, 47, 65, 235, 611, 3055, 6679, 33395, 86827, 313913, 434135, 1569565, 4080869, 20404345]

約数ペア:

[(1, 20404345), (5, 4080869), (13, 1569565), (47, 434135), (65, 313913), (235, 86827), (611, 33395), (3055, 6679)]