19997450

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{353}}^1$

素因数の和:479

約数の個数: 48

約数和(自身を含む): 41086656

約数和(自身を除く): 21089206

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 103, 110, 206, 275, 353, 515, 550, 706, 1030, 1133, 1765, 2266, 2575, 3530, 3883, 5150, 5665, 7766, 8825, 11330, 17650, 19415, 28325, 36359, 38830, 56650, 72718, 97075, 181795, 194150, 363590, 399949, 799898, 908975, 1817950, 1999745, 3999490, 9998725, 19997450]

約数ペア:

[(1, 19997450), (2, 9998725), (5, 3999490), (10, 1999745), (11, 1817950), (22, 908975), (25, 799898), (50, 399949), (55, 363590), (103, 194150), (110, 181795), (206, 97075), (275, 72718), (353, 56650), (515, 38830), (550, 36359), (706, 28325), (1030, 19415), (1133, 17650), (1765, 11330), (2266, 8825), (2575, 7766), (3530, 5665), (3883, 5150)]