21270825

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1$

素因数の和:183

約数の個数: 72

約数和(自身を含む): 41434848

約数和(自身を除く): 20164023

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 67, 75, 83, 85, 153, 201, 225, 249, 255, 335, 415, 425, 603, 747, 765, 1005, 1139, 1245, 1275, 1411, 1675, 2075, 3015, 3417, 3735, 3825, 4233, 5025, 5561, 5695, 6225, 7055, 10251, 12699, 15075, 16683, 17085, 18675, 21165, 27805, 28475, 35275, 50049, 51255, 63495, 83415, 85425, 94537, 105825, 139025, 250245, 256275, 283611, 317475, 417075, 472685, 850833, 1251225, 1418055, 2363425, 4254165, 7090275, 21270825]

約数ペア:

[(1, 21270825), (3, 7090275), (5, 4254165), (9, 2363425), (15, 1418055), (17, 1251225), (25, 850833), (45, 472685), (51, 417075), (67, 317475), (75, 283611), (83, 256275), (85, 250245), (153, 139025), (201, 105825), (225, 94537), (249, 85425), (255, 83415), (335, 63495), (415, 51255), (425, 50049), (603, 35275), (747, 28475), (765, 27805), (1005, 21165), (1139, 18675), (1245, 17085), (1275, 16683), (1411, 15075), (1675, 12699), (2075, 10251), (3015, 7055), (3417, 6225), (3735, 5695), (3825, 5561), (4233, 5025)]