21037731

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:164

約数の個数: 64

約数和(自身を含む): 36288000

約数和(自身を除く): 15250269

約数列:

[1, 3, 11, 13, 19, 29, 33, 39, 57, 87, 89, 143, 209, 247, 267, 319, 377, 429, 551, 627, 741, 957, 979, 1131, 1157, 1653, 1691, 2581, 2717, 2937, 3471, 4147, 5073, 6061, 7163, 7743, 8151, 12441, 12727, 18183, 18601, 21489, 21983, 28391, 33553, 38181, 49039, 55803, 65949, 78793, 85173, 100659, 147117, 236379, 241813, 369083, 539429, 637507, 725439, 1107249, 1618287, 1912521, 7012577, 21037731]

約数ペア:

[(1, 21037731), (3, 7012577), (11, 1912521), (13, 1618287), (19, 1107249), (29, 725439), (33, 637507), (39, 539429), (57, 369083), (87, 241813), (89, 236379), (143, 147117), (209, 100659), (247, 85173), (267, 78793), (319, 65949), (377, 55803), (429, 49039), (551, 38181), (627, 33553), (741, 28391), (957, 21983), (979, 21489), (1131, 18601), (1157, 18183), (1653, 12727), (1691, 12441), (2581, 8151), (2717, 7743), (2937, 7163), (3471, 6061), (4147, 5073)]