19968555

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{373}}^1$

素因数の和:507

約数の個数: 32

約数和(自身を含む): 33175296

約数和(自身を除く): 13206741

約数列:

[1, 3, 5, 15, 43, 83, 129, 215, 249, 373, 415, 645, 1119, 1245, 1865, 3569, 5595, 10707, 16039, 17845, 30959, 48117, 53535, 80195, 92877, 154795, 240585, 464385, 1331237, 3993711, 6656185, 19968555]

約数ペア:

[(1, 19968555), (3, 6656185), (5, 3993711), (15, 1331237), (43, 464385), (83, 240585), (129, 154795), (215, 92877), (249, 80195), (373, 53535), (415, 48117), (645, 30959), (1119, 17845), (1245, 16039), (1865, 10707), (3569, 5595)]