18757921

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{571}}^1$

素因数の和:629

約数の個数: 24

約数和(自身を含む): 24408384

約数和(自身を除く): 5650463

約数列:

[1, 7, 13, 19, 91, 133, 247, 361, 571, 1729, 2527, 3997, 4693, 7423, 10849, 32851, 51961, 75943, 141037, 206131, 987259, 1442917, 2679703, 18757921]

約数ペア:

[(1, 18757921), (7, 2679703), (13, 1442917), (19, 987259), (91, 206131), (133, 141037), (247, 75943), (361, 51961), (571, 32851), (1729, 10849), (2527, 7423), (3997, 4693)]