20497345

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 28304640

約数和(自身を除く): 7807295

約数列:

[1, 5, 11, 29, 55, 71, 145, 181, 319, 355, 781, 905, 1595, 1991, 2059, 3905, 5249, 9955, 10295, 12851, 22649, 26245, 57739, 64255, 113245, 141361, 288695, 372679, 706805, 1863395, 4099469, 20497345]

約数ペア:

[(1, 20497345), (5, 4099469), (11, 1863395), (29, 706805), (55, 372679), (71, 288695), (145, 141361), (181, 113245), (319, 64255), (355, 57739), (781, 26245), (905, 22649), (1595, 12851), (1991, 10295), (2059, 9955), (3905, 5249)]