21729834

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{347}}^1$

素因数の和:440

約数の個数: 72

約数和(自身を含む): 55699488

約数和(自身を除く): 33969654

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 71, 98, 126, 142, 147, 213, 294, 347, 426, 441, 497, 639, 694, 882, 994, 1041, 1278, 1491, 2082, 2429, 2982, 3123, 3479, 4473, 4858, 6246, 6958, 7287, 8946, 10437, 14574, 17003, 20874, 21861, 24637, 31311, 34006, 43722, 49274, 51009, 62622, 73911, 102018, 147822, 153027, 172459, 221733, 306054, 344918, 443466, 517377, 1034754, 1207213, 1552131, 2414426, 3104262, 3621639, 7243278, 10864917, 21729834]

約数ペア:

[(1, 21729834), (2, 10864917), (3, 7243278), (6, 3621639), (7, 3104262), (9, 2414426), (14, 1552131), (18, 1207213), (21, 1034754), (42, 517377), (49, 443466), (63, 344918), (71, 306054), (98, 221733), (126, 172459), (142, 153027), (147, 147822), (213, 102018), (294, 73911), (347, 62622), (426, 51009), (441, 49274), (497, 43722), (639, 34006), (694, 31311), (882, 24637), (994, 21861), (1041, 20874), (1278, 17003), (1491, 14574), (2082, 10437), (2429, 8946), (2982, 7287), (3123, 6958), (3479, 6246), (4473, 4858)]