215996979

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{631}}^1$

素因数の和:720

約数の個数: 48

約数和(自身を含む): 338913792

約数和(自身を除く): 122916813

約数列:

[1, 3, 11, 23, 33, 41, 69, 121, 123, 253, 363, 451, 631, 759, 943, 1353, 1893, 2783, 2829, 4961, 6941, 8349, 10373, 14513, 14883, 20823, 25871, 31119, 43539, 76351, 77613, 114103, 159643, 229053, 284581, 342309, 478929, 595033, 853743, 1756073, 1785099, 3130391, 5268219, 6545363, 9391173, 19636089, 71998993, 215996979]

約数ペア:

[(1, 215996979), (3, 71998993), (11, 19636089), (23, 9391173), (33, 6545363), (41, 5268219), (69, 3130391), (121, 1785099), (123, 1756073), (253, 853743), (363, 595033), (451, 478929), (631, 342309), (759, 284581), (943, 229053), (1353, 159643), (1893, 114103), (2783, 77613), (2829, 76351), (4961, 43539), (6941, 31119), (8349, 25871), (10373, 20823), (14513, 14883)]