21651399

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 39436800

約数和(自身を除く): 17785401

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 157, 199, 231, 471, 597, 693, 1099, 1393, 1413, 1727, 1791, 2189, 3297, 4179, 5181, 6567, 9891, 12089, 12537, 15323, 15543, 19701, 31243, 36267, 45969, 93729, 108801, 137907, 218701, 281187, 343673, 656103, 1031019, 1968309, 2405711, 3093057, 7217133, 21651399]

約数ペア:

[(1, 21651399), (3, 7217133), (7, 3093057), (9, 2405711), (11, 1968309), (21, 1031019), (33, 656103), (63, 343673), (77, 281187), (99, 218701), (157, 137907), (199, 108801), (231, 93729), (471, 45969), (597, 36267), (693, 31243), (1099, 19701), (1393, 15543), (1413, 15323), (1727, 12537), (1791, 12089), (2189, 9891), (3297, 6567), (4179, 5181)]