20718963

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{563}}^1$

素因数の和:648

約数の個数: 32

約数和(自身を含む): 32486400

約数和(自身を除く): 11767437

約数列:

[1, 3, 9, 27, 29, 47, 87, 141, 261, 423, 563, 783, 1269, 1363, 1689, 4089, 5067, 12267, 15201, 16327, 26461, 36801, 48981, 79383, 146943, 238149, 440829, 714447, 767369, 2302107, 6906321, 20718963]

約数ペア:

[(1, 20718963), (3, 6906321), (9, 2302107), (27, 767369), (29, 714447), (47, 440829), (87, 238149), (141, 146943), (261, 79383), (423, 48981), (563, 36801), (783, 26461), (1269, 16327), (1363, 15201), (1689, 12267), (4089, 5067)]