21389876

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 41771520

約数和(自身を除く): 20381644

約数列:

[1, 2, 4, 17, 31, 34, 62, 68, 73, 124, 139, 146, 278, 292, 527, 556, 1054, 1241, 2108, 2263, 2363, 2482, 4309, 4526, 4726, 4964, 8618, 9052, 9452, 10147, 17236, 20294, 38471, 40588, 73253, 76942, 146506, 153884, 172499, 293012, 314557, 344998, 629114, 689996, 1258228, 5347469, 10694938, 21389876]

約数ペア:

[(1, 21389876), (2, 10694938), (4, 5347469), (17, 1258228), (31, 689996), (34, 629114), (62, 344998), (68, 314557), (73, 293012), (124, 172499), (139, 153884), (146, 146506), (278, 76942), (292, 73253), (527, 40588), (556, 38471), (1054, 20294), (1241, 17236), (2108, 10147), (2263, 9452), (2363, 9052), (2482, 8618), (4309, 4964), (4526, 4726)]