21478226

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:471

約数の個数: 48

約数和(自身を含む): 41879040

約数和(自身を除く): 20400814

約数列:

[1, 2, 7, 11, 14, 22, 31, 62, 77, 121, 154, 217, 242, 341, 409, 434, 682, 818, 847, 1694, 2387, 2863, 3751, 4499, 4774, 5726, 7502, 8998, 12679, 25358, 26257, 31493, 49489, 52514, 62986, 88753, 98978, 139469, 177506, 278938, 346423, 692846, 976283, 1534159, 1952566, 3068318, 10739113, 21478226]

約数ペア:

[(1, 21478226), (2, 10739113), (7, 3068318), (11, 1952566), (14, 1534159), (22, 976283), (31, 692846), (62, 346423), (77, 278938), (121, 177506), (154, 139469), (217, 98978), (242, 88753), (341, 62986), (409, 52514), (434, 49489), (682, 31493), (818, 26257), (847, 25358), (1694, 12679), (2387, 8998), (2863, 7502), (3751, 5726), (4499, 4774)]