21745215

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{877}}^1$

素因数の和:936

約数の個数: 48

約数和(自身を含む): 41090400

約数和(自身を除く): 19345185

約数列:

[1, 3, 5, 9, 15, 19, 29, 45, 57, 87, 95, 145, 171, 261, 285, 435, 551, 855, 877, 1305, 1653, 2631, 2755, 4385, 4959, 7893, 8265, 13155, 16663, 24795, 25433, 39465, 49989, 76299, 83315, 127165, 149967, 228897, 249945, 381495, 483227, 749835, 1144485, 1449681, 2416135, 4349043, 7248405, 21745215]

約数ペア:

[(1, 21745215), (3, 7248405), (5, 4349043), (9, 2416135), (15, 1449681), (19, 1144485), (29, 749835), (45, 483227), (57, 381495), (87, 249945), (95, 228897), (145, 149967), (171, 127165), (261, 83315), (285, 76299), (435, 49989), (551, 39465), (855, 25433), (877, 24795), (1305, 16663), (1653, 13155), (2631, 8265), (2755, 7893), (4385, 4959)]