21082016319

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{648937}}^1$

素因数の和:648984

約数の個数: 48

約数和(自身を含む): 37285381728

約数和(自身を除く): 16203365409

約数列:

[1, 3, 7, 13, 17, 21, 39, 49, 51, 91, 119, 147, 221, 273, 357, 637, 663, 833, 1547, 1911, 2499, 4641, 10829, 32487, 648937, 1946811, 4542559, 8436181, 11031929, 13627677, 25308543, 31797913, 33095787, 59053267, 77223503, 95393739, 143415077, 177159801, 231670509, 413372869, 430245231, 540564521, 1003905539, 1240118607, 1621693563, 3011716617, 7027338773, 21082016319]

約数ペア:

[(1, 21082016319), (3, 7027338773), (7, 3011716617), (13, 1621693563), (17, 1240118607), (21, 1003905539), (39, 540564521), (49, 430245231), (51, 413372869), (91, 231670509), (119, 177159801), (147, 143415077), (221, 95393739), (273, 77223503), (357, 59053267), (637, 33095787), (663, 31797913), (833, 25308543), (1547, 13627677), (1911, 11031929), (2499, 8436181), (4641, 4542559), (10829, 1946811), (32487, 648937)]