20890059905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1607}}^1\times {\mathrm{18181}}^1$

素因数の和:19817

約数の個数: 32

約数和(自身を含む): 29470549248

約数和(自身を除く): 8580489343

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 1607, 8035, 17677, 18181, 20891, 88385, 90905, 104455, 199991, 229801, 236353, 999955, 1149005, 1181765, 2599883, 12999415, 29216867, 146084335, 321385537, 379819271, 1606927685, 1899096355, 4178011981, 20890059905]

約数ペア:

[(1, 20890059905), (5, 4178011981), (11, 1899096355), (13, 1606927685), (55, 379819271), (65, 321385537), (143, 146084335), (715, 29216867), (1607, 12999415), (8035, 2599883), (17677, 1181765), (18181, 1149005), (20891, 999955), (88385, 236353), (90905, 229801), (104455, 199991)]