21340025

素因数分解:

$5^2\times 7^1\times {\mathrm{197}}^1\times {\mathrm{619}}^1$

素因数の和:833

約数の個数: 24

約数和(自身を含む): 30444480

約数和(自身を除く): 9104455

約数列:

[1, 5, 7, 25, 35, 175, 197, 619, 985, 1379, 3095, 4333, 4925, 6895, 15475, 21665, 34475, 108325, 121943, 609715, 853601, 3048575, 4268005, 21340025]

約数ペア:

[(1, 21340025), (5, 4268005), (7, 3048575), (25, 853601), (35, 609715), (175, 121943), (197, 108325), (619, 34475), (985, 21665), (1379, 15475), (3095, 6895), (4333, 4925)]