21530475

素因数分解:

$3^3\times 5^2\times {\mathrm{167}}^1\times {\mathrm{191}}^1$

素因数の和:377

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 18466965

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 167, 191, 225, 501, 573, 675, 835, 955, 1503, 1719, 2505, 2865, 4175, 4509, 4775, 5157, 7515, 8595, 12525, 14325, 22545, 25785, 31897, 37575, 42975, 95691, 112725, 128925, 159485, 287073, 478455, 797425, 861219, 1435365, 2392275, 4306095, 7176825, 21530475]

約数ペア:

[(1, 21530475), (3, 7176825), (5, 4306095), (9, 2392275), (15, 1435365), (25, 861219), (27, 797425), (45, 478455), (75, 287073), (135, 159485), (167, 128925), (191, 112725), (225, 95691), (501, 42975), (573, 37575), (675, 31897), (835, 25785), (955, 22545), (1503, 14325), (1719, 12525), (2505, 8595), (2865, 7515), (4175, 5157), (4509, 4775)]