21998425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{271}}^1$

素因数の和:489

約数の個数: 24

約数和(自身を含む): 29140992

約数和(自身を除く): 7142567

約数列:

[1, 5, 17, 25, 85, 191, 271, 425, 955, 1355, 3247, 4607, 4775, 6775, 16235, 23035, 51761, 81175, 115175, 258805, 879937, 1294025, 4399685, 21998425]

約数ペア:

[(1, 21998425), (5, 4399685), (17, 1294025), (25, 879937), (85, 258805), (191, 115175), (271, 81175), (425, 51761), (955, 23035), (1355, 16235), (3247, 6775), (4607, 4775)]