21814515

素因数分解:

$3^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{883}}^1$

素因数の和:961

約数の個数: 40

約数和(自身を含む): 39790608

約数和(自身を除く): 17976093

約数列:

[1, 3, 5, 9, 15, 27, 45, 61, 81, 135, 183, 305, 405, 549, 883, 915, 1647, 2649, 2745, 4415, 4941, 7947, 8235, 13245, 23841, 24705, 39735, 53863, 71523, 119205, 161589, 269315, 357615, 484767, 807945, 1454301, 2423835, 4362903, 7271505, 21814515]

約数ペア:

[(1, 21814515), (3, 7271505), (5, 4362903), (9, 2423835), (15, 1454301), (27, 807945), (45, 484767), (61, 357615), (81, 269315), (135, 161589), (183, 119205), (305, 71523), (405, 53863), (549, 39735), (883, 24705), (915, 23841), (1647, 13245), (2649, 8235), (2745, 7947), (4415, 4941)]