19191919

素因数分解:

${\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:330

約数の個数: 16

約数和(自身を含む): 20832480

約数和(自身を除く): 1640561

約数列:

[1, 19, 73, 101, 137, 1387, 1919, 2603, 7373, 10001, 13837, 140087, 190019, 262903, 1010101, 19191919]

約数ペア:

[(1, 19191919), (19, 1010101), (73, 262903), (101, 190019), (137, 140087), (1387, 13837), (1919, 10001), (2603, 7373)]