21191679

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{251}}^1$

素因数の和:372

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 11467521

約数列:

[1, 3, 9, 27, 53, 59, 159, 177, 251, 477, 531, 753, 1431, 1593, 2259, 3127, 6777, 9381, 13303, 14809, 28143, 39909, 44427, 84429, 119727, 133281, 359181, 399843, 784877, 2354631, 7063893, 21191679]

約数ペア:

[(1, 21191679), (3, 7063893), (9, 2354631), (27, 784877), (53, 399843), (59, 359181), (159, 133281), (177, 119727), (251, 84429), (477, 44427), (531, 39909), (753, 28143), (1431, 14809), (1593, 13303), (2259, 9381), (3127, 6777)]