19870977

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{55661}}^1$

素因数の和:55688

約数の個数: 16

約数和(自身を含む): 32061312

約数和(自身を除く): 12190335

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 55661, 166983, 389627, 946237, 1168881, 2838711, 6623659, 19870977]

約数ペア:

[(1, 19870977), (3, 6623659), (7, 2838711), (17, 1168881), (21, 946237), (51, 389627), (119, 166983), (357, 55661)]