21325239

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 35773920

約数和(自身を除く): 14448681

約数列:

[1, 3, 9, 13, 19, 39, 53, 57, 117, 159, 171, 181, 247, 477, 543, 689, 741, 1007, 1629, 2067, 2223, 2353, 3021, 3439, 6201, 7059, 9063, 9593, 10317, 13091, 21177, 28779, 30951, 39273, 44707, 86337, 117819, 124709, 134121, 182267, 374127, 402363, 546801, 1122381, 1640403, 2369471, 7108413, 21325239]

約数ペア:

[(1, 21325239), (3, 7108413), (9, 2369471), (13, 1640403), (19, 1122381), (39, 546801), (53, 402363), (57, 374127), (117, 182267), (159, 134121), (171, 124709), (181, 117819), (247, 86337), (477, 44707), (543, 39273), (689, 30951), (741, 28779), (1007, 21177), (1629, 13091), (2067, 10317), (2223, 9593), (2353, 9063), (3021, 7059), (3439, 6201)]