21069243

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:244

約数の個数: 48

約数和(自身を含む): 34967296

約数和(自身を除く): 13898053

約数列:

[1, 3, 9, 13, 31, 37, 39, 93, 111, 117, 157, 279, 333, 403, 471, 481, 1147, 1209, 1413, 1443, 2041, 3441, 3627, 4329, 4867, 5809, 6123, 10323, 14601, 14911, 17427, 18369, 43803, 44733, 52281, 63271, 75517, 134199, 180079, 189813, 226551, 540237, 569439, 679653, 1620711, 2341027, 7023081, 21069243]

約数ペア:

[(1, 21069243), (3, 7023081), (9, 2341027), (13, 1620711), (31, 679653), (37, 569439), (39, 540237), (93, 226551), (111, 189813), (117, 180079), (157, 134199), (279, 75517), (333, 63271), (403, 52281), (471, 44733), (481, 43803), (1147, 18369), (1209, 17427), (1413, 14911), (1443, 14601), (2041, 10323), (3441, 6123), (3627, 5809), (4329, 4867)]