19917291

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{197}}^1\times {\mathrm{503}}^1$

素因数の和:770

約数の個数: 16

約数和(自身を含む): 27143424

約数和(自身を除く): 7226133

約数列:

[1, 3, 67, 197, 201, 503, 591, 1509, 13199, 33701, 39597, 99091, 101103, 297273, 6639097, 19917291]

約数ペア:

[(1, 19917291), (3, 6639097), (67, 297273), (197, 101103), (201, 99091), (503, 39597), (591, 33701), (1509, 13199)]