21289644

素因数分解:

$2^2\times 3^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{809}}^1$

素因数の和:879

約数の個数: 72

約数和(自身を含む): 58378320

約数和(自身を除く): 37088676

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 43, 51, 68, 86, 102, 129, 153, 172, 204, 258, 306, 387, 516, 612, 731, 774, 809, 1462, 1548, 1618, 2193, 2427, 2924, 3236, 4386, 4854, 6579, 7281, 8772, 9708, 13158, 13753, 14562, 26316, 27506, 29124, 34787, 41259, 55012, 69574, 82518, 104361, 123777, 139148, 165036, 208722, 247554, 313083, 417444, 495108, 591379, 626166, 1182758, 1252332, 1774137, 2365516, 3548274, 5322411, 7096548, 10644822, 21289644]

約数ペア:

[(1, 21289644), (2, 10644822), (3, 7096548), (4, 5322411), (6, 3548274), (9, 2365516), (12, 1774137), (17, 1252332), (18, 1182758), (34, 626166), (36, 591379), (43, 495108), (51, 417444), (68, 313083), (86, 247554), (102, 208722), (129, 165036), (153, 139148), (172, 123777), (204, 104361), (258, 82518), (306, 69574), (387, 55012), (516, 41259), (612, 34787), (731, 29124), (774, 27506), (809, 26316), (1462, 14562), (1548, 13753), (1618, 13158), (2193, 9708), (2427, 8772), (2924, 7281), (3236, 6579), (4386, 4854)]