20842875

素因数分解:

$3^2\times 5^3\times {\mathrm{97}}^1\times {\mathrm{191}}^1$

素因数の和:309

約数の個数: 48

約数和(自身を含む): 38158848

約数和(自身を除く): 17315973

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 97, 125, 191, 225, 291, 375, 485, 573, 873, 955, 1125, 1455, 1719, 2425, 2865, 4365, 4775, 7275, 8595, 12125, 14325, 18527, 21825, 23875, 36375, 42975, 55581, 71625, 92635, 109125, 166743, 214875, 277905, 463175, 833715, 1389525, 2315875, 4168575, 6947625, 20842875]

約数ペア:

[(1, 20842875), (3, 6947625), (5, 4168575), (9, 2315875), (15, 1389525), (25, 833715), (45, 463175), (75, 277905), (97, 214875), (125, 166743), (191, 109125), (225, 92635), (291, 71625), (375, 55581), (485, 42975), (573, 36375), (873, 23875), (955, 21825), (1125, 18527), (1455, 14325), (1719, 12125), (2425, 8595), (2865, 7275), (4365, 4775)]