66639820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{256307}}^1$

素因数の和:256329

約数の個数: 24

約数和(自身を含む): 150709104

約数和(自身を除く): 84069284

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 256307, 512614, 1025228, 1281535, 2563070, 3331991, 5126140, 6663982, 13327964, 16659955, 33319910, 66639820]

約数ペア:

[(1, 66639820), (2, 33319910), (4, 16659955), (5, 13327964), (10, 6663982), (13, 5126140), (20, 3331991), (26, 2563070), (52, 1281535), (65, 1025228), (130, 512614), (260, 256307)]