21405495

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 37307520

約数和(自身を除く): 15902025

約数列:

[1, 3, 5, 15, 19, 57, 59, 67, 95, 177, 201, 285, 295, 335, 361, 885, 1005, 1083, 1121, 1273, 1805, 3363, 3819, 3953, 5415, 5605, 6365, 11859, 16815, 19095, 19765, 21299, 24187, 59295, 63897, 72561, 75107, 106495, 120935, 225321, 319485, 362805, 375535, 1126605, 1427033, 4281099, 7135165, 21405495]

約数ペア:

[(1, 21405495), (3, 7135165), (5, 4281099), (15, 1427033), (19, 1126605), (57, 375535), (59, 362805), (67, 319485), (95, 225321), (177, 120935), (201, 106495), (285, 75107), (295, 72561), (335, 63897), (361, 59295), (885, 24187), (1005, 21299), (1083, 19765), (1121, 19095), (1273, 16815), (1805, 11859), (3363, 6365), (3819, 5605), (3953, 5415)]