21679515

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1123}}^1$

素因数の和:1161

約数の個数: 64

約数和(自身を含む): 45319680

約数和(自身を除く): 23640165

約数列:

[1, 3, 5, 9, 11, 13, 15, 27, 33, 39, 45, 55, 65, 99, 117, 135, 143, 165, 195, 297, 351, 429, 495, 585, 715, 1123, 1287, 1485, 1755, 2145, 3369, 3861, 5615, 6435, 10107, 12353, 14599, 16845, 19305, 30321, 37059, 43797, 50535, 61765, 72995, 111177, 131391, 151605, 160589, 185295, 218985, 333531, 394173, 481767, 555885, 656955, 802945, 1445301, 1667655, 1970865, 2408835, 4335903, 7226505, 21679515]

約数ペア:

[(1, 21679515), (3, 7226505), (5, 4335903), (9, 2408835), (11, 1970865), (13, 1667655), (15, 1445301), (27, 802945), (33, 656955), (39, 555885), (45, 481767), (55, 394173), (65, 333531), (99, 218985), (117, 185295), (135, 160589), (143, 151605), (165, 131391), (195, 111177), (297, 72995), (351, 61765), (429, 50535), (495, 43797), (585, 37059), (715, 30321), (1123, 19305), (1287, 16845), (1485, 14599), (1755, 12353), (2145, 10107), (3369, 6435), (3861, 5615)]