21981645

素因数分解:

$3^3\times 5^1\times 7^2\times {\mathrm{3323}}^1$

素因数の和:3351

約数の個数: 48

約数和(自身を含む): 45472320

約数和(自身を除く): 23490675

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 105, 135, 147, 189, 245, 315, 441, 735, 945, 1323, 2205, 3323, 6615, 9969, 16615, 23261, 29907, 49845, 69783, 89721, 116305, 149535, 162827, 209349, 348915, 448605, 488481, 628047, 814135, 1046745, 1465443, 2442405, 3140235, 4396329, 7327215, 21981645]

約数ペア:

[(1, 21981645), (3, 7327215), (5, 4396329), (7, 3140235), (9, 2442405), (15, 1465443), (21, 1046745), (27, 814135), (35, 628047), (45, 488481), (49, 448605), (63, 348915), (105, 209349), (135, 162827), (147, 149535), (189, 116305), (245, 89721), (315, 69783), (441, 49845), (735, 29907), (945, 23261), (1323, 16615), (2205, 9969), (3323, 6615)]