20643147

素因数分解:

$3^3\times 7^1\times {\mathrm{239}}^1\times {\mathrm{457}}^1$

素因数の和:712

約数の個数: 32

約数和(自身を含む): 35174400

約数和(自身を除く): 14531253

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 239, 457, 717, 1371, 1673, 2151, 3199, 4113, 5019, 6453, 9597, 12339, 15057, 28791, 45171, 86373, 109223, 327669, 764561, 983007, 2293683, 2949021, 6881049, 20643147]

約数ペア:

[(1, 20643147), (3, 6881049), (7, 2949021), (9, 2293683), (21, 983007), (27, 764561), (63, 327669), (189, 109223), (239, 86373), (457, 45171), (717, 28791), (1371, 15057), (1673, 12339), (2151, 9597), (3199, 6453), (4113, 5019)]