19978918

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{12227}}^1$

素因数の和:12291

約数の個数: 16

約数和(自身を含む): 32281920

約数和(自身を除く): 12303002

約数列:

[1, 2, 19, 38, 43, 86, 817, 1634, 12227, 24454, 232313, 464626, 525761, 1051522, 9989459, 19978918]

約数ペア:

[(1, 19978918), (2, 9989459), (19, 1051522), (38, 525761), (43, 464626), (86, 232313), (817, 24454), (1634, 12227)]