21046995

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 38095200

約数和(自身を除く): 17048205

約数列:

[1, 3, 5, 9, 15, 43, 45, 73, 129, 149, 215, 219, 365, 387, 447, 645, 657, 745, 1095, 1341, 1935, 2235, 3139, 3285, 6407, 6705, 9417, 10877, 15695, 19221, 28251, 32035, 32631, 47085, 54385, 57663, 96105, 97893, 141255, 163155, 288315, 467711, 489465, 1403133, 2338555, 4209399, 7015665, 21046995]

約数ペア:

[(1, 21046995), (3, 7015665), (5, 4209399), (9, 2338555), (15, 1403133), (43, 489465), (45, 467711), (73, 288315), (129, 163155), (149, 141255), (215, 97893), (219, 96105), (365, 57663), (387, 54385), (447, 47085), (645, 32631), (657, 32035), (745, 28251), (1095, 19221), (1341, 15695), (1935, 10877), (2235, 9417), (3139, 6705), (3285, 6407)]