21486843

素因数分解:

$3^3\times 7^2\times {\mathrm{109}}^1\times {\mathrm{149}}^1$

素因数の和:281

約数の個数: 48

約数和(自身を含む): 37620000

約数和(自身を除く): 16133157

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 109, 147, 149, 189, 327, 441, 447, 763, 981, 1043, 1323, 1341, 2289, 2943, 3129, 4023, 5341, 6867, 7301, 9387, 16023, 16241, 20601, 21903, 28161, 48069, 48723, 65709, 113687, 144207, 146169, 197127, 341061, 438507, 795809, 1023183, 2387427, 3069549, 7162281, 21486843]

約数ペア:

[(1, 21486843), (3, 7162281), (7, 3069549), (9, 2387427), (21, 1023183), (27, 795809), (49, 438507), (63, 341061), (109, 197127), (147, 146169), (149, 144207), (189, 113687), (327, 65709), (441, 48723), (447, 48069), (763, 28161), (981, 21903), (1043, 20601), (1323, 16241), (1341, 16023), (2289, 9387), (2943, 7301), (3129, 6867), (4023, 5341)]