21617725

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{641}}^1$

素因数の和:741

約数の個数: 24

約数和(自身を含む): 28658880

約数和(自身を除く): 7041155

約数列:

[1, 5, 19, 25, 71, 95, 355, 475, 641, 1349, 1775, 3205, 6745, 12179, 16025, 33725, 45511, 60895, 227555, 304475, 864709, 1137775, 4323545, 21617725]

約数ペア:

[(1, 21617725), (5, 4323545), (19, 1137775), (25, 864709), (71, 304475), (95, 227555), (355, 60895), (475, 45511), (641, 33725), (1349, 16025), (1775, 12179), (3205, 6745)]