21305655

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{283}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 42531840

約数和(自身を除く): 21226185

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 239, 283, 315, 717, 849, 1195, 1415, 1673, 1981, 2151, 2547, 3585, 4245, 5019, 5943, 8365, 9905, 10755, 12735, 15057, 17829, 25095, 29715, 67637, 75285, 89145, 202911, 338185, 473459, 608733, 1014555, 1420377, 2367295, 3043665, 4261131, 7101885, 21305655]

約数ペア:

[(1, 21305655), (3, 7101885), (5, 4261131), (7, 3043665), (9, 2367295), (15, 1420377), (21, 1014555), (35, 608733), (45, 473459), (63, 338185), (105, 202911), (239, 89145), (283, 75285), (315, 67637), (717, 29715), (849, 25095), (1195, 17829), (1415, 15057), (1673, 12735), (1981, 10755), (2151, 9905), (2547, 8365), (3585, 5943), (4245, 5019)]