21535227

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1999}}^1$

素因数の和:2037

約数の個数: 40

約数和(自身を含む): 38720000

約数和(自身を除く): 17184773

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 399, 513, 567, 1197, 1539, 1999, 3591, 5997, 10773, 13993, 17991, 37981, 41979, 53973, 113943, 125937, 161919, 265867, 341829, 377811, 797601, 1025487, 1133433, 2392803, 3076461, 7178409, 21535227]

約数ペア:

[(1, 21535227), (3, 7178409), (7, 3076461), (9, 2392803), (19, 1133433), (21, 1025487), (27, 797601), (57, 377811), (63, 341829), (81, 265867), (133, 161919), (171, 125937), (189, 113943), (399, 53973), (513, 41979), (567, 37981), (1197, 17991), (1539, 13993), (1999, 10773), (3591, 5997)]