19946485

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{521}}^1$

素因数の和:589

約数の個数: 32

約数和(自身を含む): 28062720

約数和(自身を除く): 8116235

約数列:

[1, 5, 13, 19, 31, 65, 95, 155, 247, 403, 521, 589, 1235, 2015, 2605, 2945, 6773, 7657, 9899, 16151, 33865, 38285, 49495, 80755, 128687, 209963, 306869, 643435, 1049815, 1534345, 3989297, 19946485]

約数ペア:

[(1, 19946485), (5, 3989297), (13, 1534345), (19, 1049815), (31, 643435), (65, 306869), (95, 209963), (155, 128687), (247, 80755), (403, 49495), (521, 38285), (589, 33865), (1235, 16151), (2015, 9899), (2605, 7657), (2945, 6773)]