19829817

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{181}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 34524672

約数和(自身を除く): 14694855

約数列:

[1, 3, 7, 9, 21, 37, 47, 63, 111, 141, 181, 259, 329, 333, 423, 543, 777, 987, 1267, 1629, 1739, 2331, 2961, 3801, 5217, 6697, 8507, 11403, 12173, 15651, 20091, 25521, 36519, 46879, 59549, 60273, 76563, 109557, 140637, 178647, 314759, 421911, 535941, 944277, 2203313, 2832831, 6609939, 19829817]

約数ペア:

[(1, 19829817), (3, 6609939), (7, 2832831), (9, 2203313), (21, 944277), (37, 535941), (47, 421911), (63, 314759), (111, 178647), (141, 140637), (181, 109557), (259, 76563), (329, 60273), (333, 59549), (423, 46879), (543, 36519), (777, 25521), (987, 20091), (1267, 15651), (1629, 12173), (1739, 11403), (2331, 8507), (2961, 6697), (3801, 5217)]