18921663

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{283}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 31898880

約数和(自身を除く): 12977217

約数列:

[1, 3, 9, 17, 19, 23, 51, 57, 69, 153, 171, 207, 283, 323, 391, 437, 849, 969, 1173, 1311, 2547, 2907, 3519, 3933, 4811, 5377, 6509, 7429, 14433, 16131, 19527, 22287, 43299, 48393, 58581, 66861, 91409, 110653, 123671, 274227, 331959, 371013, 822681, 995877, 1113039, 2102407, 6307221, 18921663]

約数ペア:

[(1, 18921663), (3, 6307221), (9, 2102407), (17, 1113039), (19, 995877), (23, 822681), (51, 371013), (57, 331959), (69, 274227), (153, 123671), (171, 110653), (207, 91409), (283, 66861), (323, 58581), (391, 48393), (437, 43299), (849, 22287), (969, 19527), (1173, 16131), (1311, 14433), (2547, 7429), (2907, 6509), (3519, 5377), (3933, 4811)]