20851911

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{797}}^1$

素因数の和:845

約数の個数: 40

約数和(自身を含む): 34760880

約数和(自身を除く): 13908969

約数列:

[1, 3, 9, 17, 19, 27, 51, 57, 81, 153, 171, 323, 459, 513, 797, 969, 1377, 1539, 2391, 2907, 7173, 8721, 13549, 15143, 21519, 26163, 40647, 45429, 64557, 121941, 136287, 257431, 365823, 408861, 772293, 1097469, 1226583, 2316879, 6950637, 20851911]

約数ペア:

[(1, 20851911), (3, 6950637), (9, 2316879), (17, 1226583), (19, 1097469), (27, 772293), (51, 408861), (57, 365823), (81, 257431), (153, 136287), (171, 121941), (323, 64557), (459, 45429), (513, 40647), (797, 26163), (969, 21519), (1377, 15143), (1539, 13549), (2391, 8721), (2907, 7173)]