19917693

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^2$

素因数の和:186

約数の個数: 36

約数和(自身を含む): 31990140

約数和(自身を除く): 12072447

約数列:

[1, 3, 9, 17, 29, 51, 67, 87, 153, 201, 261, 493, 603, 1139, 1479, 1943, 3417, 4437, 4489, 5829, 10251, 13467, 17487, 33031, 40401, 76313, 99093, 130181, 228939, 297279, 390543, 686817, 1171629, 2213077, 6639231, 19917693]

約数ペア:

[(1, 19917693), (3, 6639231), (9, 2213077), (17, 1171629), (29, 686817), (51, 390543), (67, 297279), (87, 228939), (153, 130181), (201, 99093), (261, 76313), (493, 40401), (603, 33031), (1139, 17487), (1479, 13467), (1943, 10251), (3417, 5829), (4437, 4489)]