20913543

素因数分解:

$3^2\times 7^2\times {\mathrm{47}}^1\times {\mathrm{1009}}^1$

素因数の和:1076

約数の個数: 36

約数和(自身を含む): 35923680

約数和(自身を除く): 15010137

約数列:

[1, 3, 7, 9, 21, 47, 49, 63, 141, 147, 329, 423, 441, 987, 1009, 2303, 2961, 3027, 6909, 7063, 9081, 20727, 21189, 47423, 49441, 63567, 142269, 148323, 331961, 426807, 444969, 995883, 2323727, 2987649, 6971181, 20913543]

約数ペア:

[(1, 20913543), (3, 6971181), (7, 2987649), (9, 2323727), (21, 995883), (47, 444969), (49, 426807), (63, 331961), (141, 148323), (147, 142269), (329, 63567), (423, 49441), (441, 47423), (987, 21189), (1009, 20727), (2303, 9081), (2961, 7063), (3027, 6909)]