21297978

素因数分解:

$2^1\times 3^5\times {\mathrm{13}}^1\times {\mathrm{3371}}^1$

素因数の和:3401

約数の個数: 48

約数和(自身を含む): 51551136

約数和(自身を除く): 30253158

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 78, 81, 117, 162, 234, 243, 351, 486, 702, 1053, 2106, 3159, 3371, 6318, 6742, 10113, 20226, 30339, 43823, 60678, 87646, 91017, 131469, 182034, 262938, 273051, 394407, 546102, 788814, 819153, 1183221, 1638306, 2366442, 3549663, 7099326, 10648989, 21297978]

約数ペア:

[(1, 21297978), (2, 10648989), (3, 7099326), (6, 3549663), (9, 2366442), (13, 1638306), (18, 1183221), (26, 819153), (27, 788814), (39, 546102), (54, 394407), (78, 273051), (81, 262938), (117, 182034), (162, 131469), (234, 91017), (243, 87646), (351, 60678), (486, 43823), (702, 30339), (1053, 20226), (2106, 10113), (3159, 6742), (3371, 6318)]