21513555

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{419}}^1$

素因数の和:600

約数の個数: 48

約数和(自身を含む): 42981120

約数和(自身を除く): 21467565

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 163, 315, 419, 489, 815, 1141, 1257, 1467, 2095, 2445, 2933, 3423, 3771, 5705, 6285, 7335, 8799, 10269, 14665, 17115, 18855, 26397, 43995, 51345, 68297, 131985, 204891, 341485, 478079, 614673, 1024455, 1434237, 2390395, 3073365, 4302711, 7171185, 21513555]

約数ペア:

[(1, 21513555), (3, 7171185), (5, 4302711), (7, 3073365), (9, 2390395), (15, 1434237), (21, 1024455), (35, 614673), (45, 478079), (63, 341485), (105, 204891), (163, 131985), (315, 68297), (419, 51345), (489, 43995), (815, 26397), (1141, 18855), (1257, 17115), (1467, 14665), (2095, 10269), (2445, 8799), (2933, 7335), (3423, 6285), (3771, 5705)]