21165228

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1787}}^1$

素因数の和:1851

約数の個数: 72

約数和(自身を含む): 62479872

約数和(自身を除く): 41314644

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 47, 63, 84, 94, 126, 141, 188, 252, 282, 329, 423, 564, 658, 846, 987, 1316, 1692, 1787, 1974, 2961, 3574, 3948, 5361, 5922, 7148, 10722, 11844, 12509, 16083, 21444, 25018, 32166, 37527, 50036, 64332, 75054, 83989, 112581, 150108, 167978, 225162, 251967, 335956, 450324, 503934, 587923, 755901, 1007868, 1175846, 1511802, 1763769, 2351692, 3023604, 3527538, 5291307, 7055076, 10582614, 21165228]

約数ペア:

[(1, 21165228), (2, 10582614), (3, 7055076), (4, 5291307), (6, 3527538), (7, 3023604), (9, 2351692), (12, 1763769), (14, 1511802), (18, 1175846), (21, 1007868), (28, 755901), (36, 587923), (42, 503934), (47, 450324), (63, 335956), (84, 251967), (94, 225162), (126, 167978), (141, 150108), (188, 112581), (252, 83989), (282, 75054), (329, 64332), (423, 50036), (564, 37527), (658, 32166), (846, 25018), (987, 21444), (1316, 16083), (1692, 12509), (1787, 11844), (1974, 10722), (2961, 7148), (3574, 5922), (3948, 5361)]