19428475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:148

約数の個数: 48

約数和(自身を含む): 28283904

約数和(自身を除く): 8855429

約数列:

[1, 5, 11, 25, 31, 43, 53, 55, 155, 215, 265, 275, 341, 473, 583, 775, 1075, 1325, 1333, 1643, 1705, 2279, 2365, 2915, 6665, 8215, 8525, 11395, 11825, 14575, 14663, 18073, 25069, 33325, 41075, 56975, 70649, 73315, 90365, 125345, 353245, 366575, 451825, 626725, 777139, 1766225, 3885695, 19428475]

約数ペア:

[(1, 19428475), (5, 3885695), (11, 1766225), (25, 777139), (31, 626725), (43, 451825), (53, 366575), (55, 353245), (155, 125345), (215, 90365), (265, 73315), (275, 70649), (341, 56975), (473, 41075), (583, 33325), (775, 25069), (1075, 18073), (1325, 14663), (1333, 14575), (1643, 11825), (1705, 11395), (2279, 8525), (2365, 8215), (2915, 6665)]