21064225

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{197}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 32997888

約数和(自身を除く): 11933663

約数列:

[1, 5, 7, 13, 25, 35, 47, 65, 91, 175, 197, 235, 325, 329, 455, 611, 985, 1175, 1379, 1645, 2275, 2561, 3055, 4277, 4925, 6895, 8225, 9259, 12805, 15275, 17927, 21385, 34475, 46295, 64025, 64813, 89635, 106925, 120367, 231475, 324065, 448175, 601835, 842569, 1620325, 3009175, 4212845, 21064225]

約数ペア:

[(1, 21064225), (5, 4212845), (7, 3009175), (13, 1620325), (25, 842569), (35, 601835), (47, 448175), (65, 324065), (91, 231475), (175, 120367), (197, 106925), (235, 89635), (325, 64813), (329, 64025), (455, 46295), (611, 34475), (985, 21385), (1175, 17927), (1379, 15275), (1645, 12805), (2275, 9259), (2561, 8225), (3055, 6895), (4277, 4925)]