21006475

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{307}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 32997888

約数和(自身を除く): 11991413

約数列:

[1, 5, 7, 17, 23, 25, 35, 85, 115, 119, 161, 175, 307, 391, 425, 575, 595, 805, 1535, 1955, 2149, 2737, 2975, 4025, 5219, 7061, 7675, 9775, 10745, 13685, 26095, 35305, 36533, 49427, 53725, 68425, 120037, 130475, 176525, 182665, 247135, 600185, 840259, 913325, 1235675, 3000925, 4201295, 21006475]

約数ペア:

[(1, 21006475), (5, 4201295), (7, 3000925), (17, 1235675), (23, 913325), (25, 840259), (35, 600185), (85, 247135), (115, 182665), (119, 176525), (161, 130475), (175, 120037), (307, 68425), (391, 53725), (425, 49427), (575, 36533), (595, 35305), (805, 26095), (1535, 13685), (1955, 10745), (2149, 9775), (2737, 7675), (2975, 7061), (4025, 5219)]