21960575

素因数分解:

$5^2\times 7^3\times {\mathrm{13}}^1\times {\mathrm{197}}^1$

素因数の和:241

約数の個数: 48

約数和(自身を含む): 34372800

約数和(自身を除く): 12412225

約数列:

[1, 5, 7, 13, 25, 35, 49, 65, 91, 175, 197, 245, 325, 343, 455, 637, 985, 1225, 1379, 1715, 2275, 2561, 3185, 4459, 4925, 6895, 8575, 9653, 12805, 15925, 17927, 22295, 34475, 48265, 64025, 67571, 89635, 111475, 125489, 241325, 337855, 448175, 627445, 878423, 1689275, 3137225, 4392115, 21960575]

約数ペア:

[(1, 21960575), (5, 4392115), (7, 3137225), (13, 1689275), (25, 878423), (35, 627445), (49, 448175), (65, 337855), (91, 241325), (175, 125489), (197, 111475), (245, 89635), (325, 67571), (343, 64025), (455, 48265), (637, 34475), (985, 22295), (1225, 17927), (1379, 15925), (1715, 12805), (2275, 9653), (2561, 8575), (3185, 6895), (4459, 4925)]