21220668

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{787}}^1$

素因数の和:911

約数の個数: 72

約数和(自身を含む): 61955712

約数和(自身を除く): 40735044

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 107, 126, 214, 252, 321, 428, 642, 749, 787, 963, 1284, 1498, 1574, 1926, 2247, 2361, 2996, 3148, 3852, 4494, 4722, 5509, 6741, 7083, 8988, 9444, 11018, 13482, 14166, 16527, 22036, 26964, 28332, 33054, 49581, 66108, 84209, 99162, 168418, 198324, 252627, 336836, 505254, 589463, 757881, 1010508, 1178926, 1515762, 1768389, 2357852, 3031524, 3536778, 5305167, 7073556, 10610334, 21220668]

約数ペア:

[(1, 21220668), (2, 10610334), (3, 7073556), (4, 5305167), (6, 3536778), (7, 3031524), (9, 2357852), (12, 1768389), (14, 1515762), (18, 1178926), (21, 1010508), (28, 757881), (36, 589463), (42, 505254), (63, 336836), (84, 252627), (107, 198324), (126, 168418), (214, 99162), (252, 84209), (321, 66108), (428, 49581), (642, 33054), (749, 28332), (787, 26964), (963, 22036), (1284, 16527), (1498, 14166), (1574, 13482), (1926, 11018), (2247, 9444), (2361, 8988), (2996, 7083), (3148, 6741), (3852, 5509), (4494, 4722)]