21615075

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5651}}^1$

素因数の和:5684

約数の個数: 36

約数和(自身を含む): 40999608

約数和(自身を除く): 19384533

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5651, 16953, 28255, 50859, 84765, 96067, 141275, 254295, 288201, 423825, 480335, 864603, 1271475, 1441005, 2401675, 4323015, 7205025, 21615075]

約数ペア:

[(1, 21615075), (3, 7205025), (5, 4323015), (9, 2401675), (15, 1441005), (17, 1271475), (25, 864603), (45, 480335), (51, 423825), (75, 288201), (85, 254295), (153, 141275), (225, 96067), (255, 84765), (425, 50859), (765, 28255), (1275, 16953), (3825, 5651)]