19784991

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{167}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 29611008

約数和(自身を除く): 9826017

約数列:

[1, 3, 17, 23, 51, 69, 101, 167, 303, 391, 501, 1173, 1717, 2323, 2839, 3841, 5151, 6969, 8517, 11523, 16867, 39491, 50601, 65297, 118473, 195891, 286739, 387941, 860217, 1163823, 6594997, 19784991]

約数ペア:

[(1, 19784991), (3, 6594997), (17, 1163823), (23, 860217), (51, 387941), (69, 286739), (101, 195891), (167, 118473), (303, 65297), (391, 50601), (501, 39491), (1173, 16867), (1717, 11523), (2323, 8517), (2839, 6969), (3841, 5151)]