65521025

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{271}}^1\times {\mathrm{509}}^1$

素因数の和:809

約数の個数: 24

約数和(自身を含む): 86006400

約数和(自身を除く): 20485375

約数列:

[1, 5, 19, 25, 95, 271, 475, 509, 1355, 2545, 5149, 6775, 9671, 12725, 25745, 48355, 128725, 137939, 241775, 689695, 2620841, 3448475, 13104205, 65521025]

約数ペア:

[(1, 65521025), (5, 13104205), (19, 3448475), (25, 2620841), (95, 689695), (271, 241775), (475, 137939), (509, 128725), (1355, 48355), (2545, 25745), (5149, 12725), (6775, 9671)]