21328083

素因数分解:

$3^3\times 7^5\times {\mathrm{47}}^1$

素因数の和:91

約数の個数: 48

約数和(自身を含む): 37647360

約数和(自身を除く): 16319277

約数列:

[1, 3, 7, 9, 21, 27, 47, 49, 63, 141, 147, 189, 329, 343, 423, 441, 987, 1029, 1269, 1323, 2303, 2401, 2961, 3087, 6909, 7203, 8883, 9261, 16121, 16807, 20727, 21609, 48363, 50421, 62181, 64827, 112847, 145089, 151263, 338541, 435267, 453789, 789929, 1015623, 2369787, 3046869, 7109361, 21328083]

約数ペア:

[(1, 21328083), (3, 7109361), (7, 3046869), (9, 2369787), (21, 1015623), (27, 789929), (47, 453789), (49, 435267), (63, 338541), (141, 151263), (147, 145089), (189, 112847), (329, 64827), (343, 62181), (423, 50421), (441, 48363), (987, 21609), (1029, 20727), (1269, 16807), (1323, 16121), (2303, 9261), (2401, 8883), (2961, 7203), (3087, 6909)]