21187605

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{307}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 35126784

約数和(自身を除く): 13939179

約数列:

[1, 3, 5, 15, 43, 107, 129, 215, 307, 321, 535, 645, 921, 1535, 1605, 4601, 4605, 13201, 13803, 23005, 32849, 39603, 66005, 69015, 98547, 164245, 198015, 492735, 1412507, 4237521, 7062535, 21187605]

約数ペア:

[(1, 21187605), (3, 7062535), (5, 4237521), (15, 1412507), (43, 492735), (107, 198015), (129, 164245), (215, 98547), (307, 69015), (321, 66005), (535, 39603), (645, 32849), (921, 23005), (1535, 13803), (1605, 13201), (4601, 4605)]