20951217

素因数分解:

$3^5\times 7^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1$

素因数の和:244

約数の個数: 48

約数和(自身を含む): 36516480

約数和(自身を除く): 15565263

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 109, 113, 189, 243, 327, 339, 567, 763, 791, 981, 1017, 1701, 2289, 2373, 2943, 3051, 6867, 7119, 8829, 9153, 12317, 20601, 21357, 26487, 27459, 36951, 61803, 64071, 86219, 110853, 185409, 192213, 258657, 332559, 775971, 997677, 2327913, 2993031, 6983739, 20951217]

約数ペア:

[(1, 20951217), (3, 6983739), (7, 2993031), (9, 2327913), (21, 997677), (27, 775971), (63, 332559), (81, 258657), (109, 192213), (113, 185409), (189, 110853), (243, 86219), (327, 64071), (339, 61803), (567, 36951), (763, 27459), (791, 26487), (981, 21357), (1017, 20601), (1701, 12317), (2289, 9153), (2373, 8829), (2943, 7119), (3051, 6867)]