208400725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{571}}^1\times {\mathrm{1123}}^1$

素因数の和:1717

約数の個数: 24

約数和(自身を含む): 279030752

約数和(自身を除く): 70630027

約数列:

[1, 5, 13, 25, 65, 325, 571, 1123, 2855, 5615, 7423, 14275, 14599, 28075, 37115, 72995, 185575, 364975, 641233, 3206165, 8336029, 16030825, 41680145, 208400725]

約数ペア:

[(1, 208400725), (5, 41680145), (13, 16030825), (25, 8336029), (65, 3206165), (325, 641233), (571, 364975), (1123, 185575), (2855, 72995), (5615, 37115), (7423, 28075), (14275, 14599)]