21091509

素因数分解:

$3^4\times {\mathrm{17}}^3\times {\mathrm{53}}^1$

素因数の和:116

約数の個数: 40

約数和(自身を含む): 34107480

約数和(自身を除く): 13015971

約数列:

[1, 3, 9, 17, 27, 51, 53, 81, 153, 159, 289, 459, 477, 867, 901, 1377, 1431, 2601, 2703, 4293, 4913, 7803, 8109, 14739, 15317, 23409, 24327, 44217, 45951, 72981, 132651, 137853, 260389, 397953, 413559, 781167, 1240677, 2343501, 7030503, 21091509]

約数ペア:

[(1, 21091509), (3, 7030503), (9, 2343501), (17, 1240677), (27, 781167), (51, 413559), (53, 397953), (81, 260389), (153, 137853), (159, 132651), (289, 72981), (459, 45951), (477, 44217), (867, 24327), (901, 23409), (1377, 15317), (1431, 14739), (2601, 8109), (2703, 7803), (4293, 4913)]