21046221

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{457}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 37724544

約数和(自身を除く): 16678323

約数列:

[1, 3, 7, 9, 17, 21, 43, 51, 63, 119, 129, 153, 301, 357, 387, 457, 731, 903, 1071, 1371, 2193, 2709, 3199, 4113, 5117, 6579, 7769, 9597, 15351, 19651, 23307, 28791, 46053, 54383, 58953, 69921, 137557, 163149, 176859, 334067, 412671, 489447, 1002201, 1238013, 2338469, 3006603, 7015407, 21046221]

約数ペア:

[(1, 21046221), (3, 7015407), (7, 3006603), (9, 2338469), (17, 1238013), (21, 1002201), (43, 489447), (51, 412671), (63, 334067), (119, 176859), (129, 163149), (153, 137557), (301, 69921), (357, 58953), (387, 54383), (457, 46053), (731, 28791), (903, 23307), (1071, 19651), (1371, 15351), (2193, 9597), (2709, 7769), (3199, 6579), (4113, 5117)]