21790923

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1$

素因数の和:248

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 18022197

約数列:

[1, 3, 7, 11, 17, 21, 31, 33, 51, 77, 93, 119, 179, 187, 217, 231, 341, 357, 527, 537, 561, 651, 1023, 1253, 1309, 1581, 1969, 2387, 3043, 3689, 3759, 3927, 5549, 5797, 5907, 7161, 9129, 11067, 13783, 16647, 17391, 21301, 33473, 38843, 40579, 41349, 61039, 63903, 94333, 100419, 116529, 121737, 183117, 234311, 282999, 427273, 660331, 702933, 1037663, 1281819, 1980993, 3112989, 7263641, 21790923]

約数ペア:

[(1, 21790923), (3, 7263641), (7, 3112989), (11, 1980993), (17, 1281819), (21, 1037663), (31, 702933), (33, 660331), (51, 427273), (77, 282999), (93, 234311), (119, 183117), (179, 121737), (187, 116529), (217, 100419), (231, 94333), (341, 63903), (357, 61039), (527, 41349), (537, 40579), (561, 38843), (651, 33473), (1023, 21301), (1253, 17391), (1309, 16647), (1581, 13783), (1969, 11067), (2387, 9129), (3043, 7161), (3689, 5907), (3759, 5797), (3927, 5549)]